Jacoco Code Coverage Not Working

A code coverage tool, such as JaCoCo, can compute execution at the class, method, line, and down to the Java byte code level. As discussed in my article about 100% Code Coverage*, a code coverage tool should provide the means not only to measure code coverage, but also to enforce it. This video explain you how to check code coverage using jacoco and how to generate code coverage report #JavaTechie #Maven #Jacoco GitHub: https://github. The problem with this approach is that it can lead to reporting of coverage (or lack of) for elements which are not present in the actual Java source code. Jacoco is not excluding the files from code coverage. This article is about measuring of Java code coverage during Maven build. JaCoCo uses the standard JVM Tool Interface. Automating code coverage and static analysis with Jenkins, JaCoCo, and SonarQube So now that I had a Maven build running in Jenkins (as outlined in a previous post ), I wanted to get some static analysis and code coverage data as part of the build. JaCoCo is a free code coverage library for Java. It’s free to open source library developed by EclEmma. Creates a code coverage report for tests of a single project in multiple formats (HTML, XML, and CSV). exec file will be generated. So, we have set up a pipeline in Azure to build our Android App. We use it to collect code coverage. Enabling JavaScript/TypeScript Code Coverage in a VSTS/TFS Build. I currently use sonar to determine the code coverage from my unit. , out of the box, as a code coverage engine for Maven projects, since Cobertura does not work with JDK 7 language constructs. How can you objectively ensure that code coverage is 100%? Jacoco comes to rescue. To know how to solve it, you must understand, how sonar is doing the analysis. Download the Maven project - 4. Coverage overview: The Coverage view lists coverage summaries for your Java projects, allowing drill-down to method level. JaCoCo stores the coverage result in a. I have selected deafult gradle task in the pipeline and selected "Jacoco" for code coverage calculation, please find the pipeline task in yml:. Configuration is based on a requirements of a project where I was implementing this. partly duplicate of issue 214236. I depend on Jacoco for that. 2, JaCoCo is supported as a code coverage engine, since Cobertura does not work with JDK 7 language constructs. However it is possible to combine QF-Test with Open Source Tools like JaCoCo. very open to hacking, I found several “fixes” but they didn’t work for me. I don’t know why gradle and android studio was not working previously. Demo Project. The JaCoCo plugin provides code coverage metrics for Java code via integration with JaCoCo. In addition, it does not make sense to enforce code coverage on some Maven modules such as those generated in GRPC. I've enabled the jacoco coverage feature in my ant build on the TC server. Unifying Test Coverage Reports for Unit- and Android-Tests. Overall Report for. I am using Arquillian for integration testing with TomEE container and using Jacoco for code coverage. A customizable color code highlights fully, partly and not covered lines. In NetBeans IDE 7. There is JaCoCo plugin that is used with Maven. Jacoco is a framework that creates code coverage reports that show you how much of your code has or has not been touched in your tests. Unfortunately, this is not the case since Jacoco also counts the generated code from Lombok: Jacoco Code Coverage Report including Lombok. We're using JaCoCo for coverage in our code and noticed that no coverage is reported for target classes that have been executed by unit tests that using a particular feature of PowerMock, specifically the @PrepareForTest annotation. This article is about measuring of Java code coverage during Maven build. It is looking for the jacoco*. Code coverage requirements can be specified for a project as a whole, for individual files, and for particular JaCoCo-specific types of coverage, e. The job pag= e will be enhanced with a chart with the trend of code coverage over the la= st builds. To help us with this we're making use of two tools, these are: Jacoco - a code coverage plugin that will generate reports that we can use for coverage analysis. Please use our mailing list for questions regarding JaCoCo which are not already covered by the extensive documentation. It was developed as a a eplacement for EMMA under the umbrella of the EclEmma eclipse project, and is currently the only byte code coverage tool that works with Java 8. Why measure code coverage? The more code that you have covered the lower the probability of potential bugs. Code is considered as executed when a subsequent probe has been executed. Clone/download the working project from Github. PCGS PL65-67 SCBC-3985 8,800 Sets,10xPARKER CLASSIC GOLD GT GOLD TRIM ORIGINAL BALL PEN - LOWEST SHIPPING CHARGES. My code is 100% tested but I have no report proofing this. If you are using these tasks, you do not need a separate Publish Code Coverage Results task in the pipeline. so I build source code in ubuntu. Researched and added code coverage analysis to build (EclEmma - JaCoCo). To demonstrate the problem and eliminate our setup as potential source of the problem I've created a small sample project which uses the 0. 0 onwards, one cannot configure Jacoco using the android DSL block. It is looking for the jacoco*. , out of the box, as a code coverage engine for Maven projects, since Cobertura does not work with JDK 7 language constructs. Please suggest me why jacoco code coverage is not getting generated ?. In this tutorial we will understand how to configure Jacoco in maven and how to use Jacoco to see code coverage report. Everything is working perfectly. Clover has great and highly configurable HTML reports (showing not only code coverage but also top risks etc), per-test code coverage and test optimization, distributed per-test coverage and many tool integrations; it is being actively developed and supported. Enabling JavaScript/TypeScript Code Coverage in a VSTS/TFS Build. not using the autrun command), and which use Java 1. Maven – Jacoco example (line coverage) Maven – PITest example (mutation coverage) 5. - Using branching strategy for source code management in SVN. Probes are inserted into the control flow at certain positions. JaCoCo is a free Java code coverage library distributed under the Eclipse Public License. Aaaaaand, that's it! Enjoy the unified coverage report working with Android plugin 3. Tasks such as Visual Studio Test,. Questions: I am developing apps using Android Studio. As a consequence, JaCoCo is not suitable for exception. Java Unit Test Code Coverage with SonarQube, Maven and JaCoCo. - Involve in sprint planning, participate in daily scrum meeting. I integrated JaCoCo Java Code Coverage Library with Maven, We need a project to work on. Enabling JaCoco coverage. JaCoCo is a great open-source toolkit for code coverage measurements. On code coverage, xyzimpl. NET Core, Ant, Maven, Gulp, Grunt also provide the option to publish code coverage data to the pipeline. Easy to use thanks to off-line byte code instrumentation. Check the project homepage for downloads, documentation and feedback. This is now expected to have it on a couple of files and have 0% of coverage for these files in SonarQube. Re: No code coverage in ant build Hi David, sorry for the delay, I haven't had access to my machine for the last couple of days. So at this point we have a test-ready project setup. It seems, only maven is supported. One is running code coverage on each build measuring unit tests coverage. Maven – Jacoco example (line coverage) Maven – PITest example (mutation coverage) 5. but it's not working please let me know what I'm doing wrong/missing here. It brings code coverage analysis directly into the Eclipse workbench: Fast develop/test cycle: Launches from within the workbench like JUnit test runs can directly be analyzed for code coverage. Author’s highlight. To know how to solve it, you must understand, how sonar is doing the analysis. Still, there could be a case where the application under test does not support Java agents. EMMA distinguishes itself from other tools by going after a unique feature combination: support for large-scale enterprise software development while keeping individual developer's work fast and iterative. PCGS PL65-67 SCBC-3985 8,800 Sets,10xPARKER CLASSIC GOLD GT GOLD TRIM ORIGINAL BALL PEN - LOWEST SHIPPING CHARGES. JaCoCo is a free Java code coverage library distributed under the Eclipse Public License. com In this video, I provided in detailed explanation about getting the code coverage. Android Studio generates HTML coverage reports only for instrumentation test. The ant report target looks like :. This is now expected to have it on a couple of files and have 0% of coverage for these files in SonarQube. If not just use the Demo project so you can have a preview. When i moved the exec file into the correct folder, the build would complete, but no code coverage information was generated, and the console would still display: [JaCoCo plugin] Number of found exec files: 0. exec file, only the matching version of the jacoco-plugin will be able to process the data. c and c has c1, c2, c3, auto. Both the class under test and the unit test code itself has no coverage report (when obviously, it has executed). See how to implement an end-to-end testing scenario in this walkthrough using Jacoco agent, to ensure good code coverage and a quality application or software. Demo Project. It brings code coverage analysis directly into the Eclipse workbench: Fast develop/test cycle: Launches from within the workbench like JUnit test runs can directly be analyzed for code coverage. xmlReportPaths then it is not showing coverage. Code coverage is a measure we're using to check how much of our source code was tested. 0 onwards, one cannot configure Jacoco using the android DSL block. Coverage overview: The Coverage view lists coverage summaries for your Java projects, allowing drill-down to method level. ` we have in our code! This right here seemed to be a hard wall for our adoption of Kotlin. Active 10 months ago. I don’t know why gradle and android studio was not working previously. Static Code Analysis. Code Coverage with Jacoco, Sonarqube, and Maven. NetBeans module that provides JaCoCo code coverage for Ant based Java SE, Java EE and NetBeans Module projects (JDK5,6,7,8 compatible). com In Eclipse, I have used EcLEmma to see the unit test code coverage. currently I am generating integration test code coverage with-javaagent. JaCoCo is a free code coverage library for Java, which has been created by the EclEmma team based on the lessons learned from using and integration existing libraries for many years. I just removed the @Config annotation from the Robolectric test, as it isn't needed anymore. When working. My project is a multi module maven project. To perform some simple experiments, download Esprima, Escodegen and a raw copy of instrumenter. However there is a way to make it work together, using the PowerMock javaagent. exec file, only the matching version of the jacoco-plugin will be able to process the data. In contrast to Cobertura, JaCoCo does on-the-fly instrumentation using an agent attached to the Java class loader. There are a lot of plugins which currently implement code coverage; however, they all use similar config, charts, and content. gradle jacoco plugin generates code coverage exec files at each module level and an aggregated report in the root directory. - Manage automation test data. With that out of the way, let's get back to helping developers pick a tool to keep an eye on code coverage. Once configured this needs no manual intervention. Hi, I'm still not able to get it to work. How to use JaCoCo code coverage without eclipse Java code coverage report can be generated without eclipse, Just need jacocoagent jar and some command to generate the code coverage report. If your way of working includes writing unit tests for every new feature or change (preferably before writing production code by practicing Test. For report generation the same class files must be used as at runtime. This message “Cannot import coverage information for file” is exactly the fix we did this week to prevent the full code scan to stop because the JaCoCo XML file is containing invalid data. I've enabled the jacoco coverage feature in my ant build on the TC server. Offline instrumentation has several drawbacks and should only be used if a specific scenario explicitly requires this mode. Not sure which of the dependencies broke Jacoco coverage report, but after upgrading to test lib v22. Still, there could be a case where the application under test does not support Java agents. Open the Edit Run/Debug Configuration dialog, add the desired run/debug configuration, and click the Code Coverage tab. Code coverage is a software metric used to measure how many lines of our code are executed during automated tests. Note:This goal should be used as a Maven report. Here is my observation. Code coverage is a tool that developers should use — not something that should be done to them. Android studio default Jacoco working fine for me. Here is one which seems relevant for Eclipse development: rather than focusing on the coverage metrics, coverage can be used to detect not covered code and decide on what tests to add. From within the module directory, I generate the exec files: mvn clean org. It was developed as a a eplacement for EMMA under the umbrella of the EclEmma eclipse project, and is currently the only byte code coverage tool that works with Java 8. NET Core, Ant, Maven, Gulp, Grunt also provide the option to publish code coverage data to the pipeline. From what I understand the class files produced by Kotlin seem to be “not strict enough” in their debug data for jacoco… whatever that means. I am using jacoco-maven-plugin v0. I see the following in my build log: Here is the resulting jacoco. with output=file and dumponexit=true, the coverage for all the applications comes after shutting down. The most common mechanism for tracking Java code coverage is to instrument this bytecode. 12 - Coverage is proper. Robin Roos Created November 10, 2014 15:54. So, in JaCoCo's eyes we are missing a branch for every `?. Note:This goal should be used as a Maven report. Configuring code coverage measurement options. After doing a quick search on the web, it looks like I can easily use Coverlet. JaCoCo was developed as a replacement for EMMA – however, I am not sure if JaCoCo is based on the EMMA code. You should try to have a high branch coverage of your unit tests. c and c has c1, c2, c3, auto. xml file, which you previously modified to include the authentication token. Being able to view Jacoco reports as well would be awesome. Below is the part of my parent pom. Code coverage helps to answer these questions. Else need to know which package or class it has touched in web application code for a scenario done. I currently use sonar to determine the code coverage from my unit. The current job deltas coverage is calculated compared to the last successful build. Note JaCoCo is an actively developed line coverage tool, that is used to measure how many lines of our code are tested. JaCoCo stores the coverage result in a. I am using jacoco-maven-plugin v0. c and c has c1, c2, c3, auto. So at this point we have a test-ready project setup. Now I added JaCoCo code coverage as a plugin and tried to configure Jubula to work with. Coverage is not a cure all for bug free code, but does force you to think about writing more tests. Still, there could be a case where the application under test does not support Java agents. How to Set Up Code Coverage for a Java Project using Gradle, Travis, JaCoCo and Codecov. /gradlew jacocoTestReport can I receive reports properly in this environment? how can i get report correctly?. Code is considered as executed when a subsequent probe has been executed. 6 version or above. Both the class under test and the unit test code itself has no coverage report (when obviously, it has executed). If not just use the Demo project so you can have a preview. Then you will see code coverage results in build summary page. High code coverage does not guarantee high quality of those tests. JaCoCo was originally written for Java and runs on the JVM, but because it’s bytecode-based it works for Scala too. Our test cases need to run in the container, and now jacoco could only collecte the data of these test cases but not XTS codes. As we know unfortunately Maven has no out of the box support for different test types. Enforcing Minimum Code Coverage If you want to enforce minimum code coverage check, JaCoCo worked really in the projects that I’ve worked on so far. I have a maven multi-module project and I'm using jacoco-maven for code coverage reports. If you want to have line number information included in the coverage reports or you want source code highlighting the class files of the test target must be compiled with debug information. To get this up and working we need to add the jacoco maven plugin as shown below. Coverage is not proper. As discussed in my article about 100% Code Coverage*, a code coverage tool should provide the means not only to measure code coverage, but also to enforce it. Jacoco counts this in its code coverage report as there is a possibility a new instance of DateTimeContstants could be created. Specify how you want to process the coverage results. Offline instrumentation has several drawbacks and should only be used if a specific scenario explicitly requires this mode. js from Istanbul's GitHub. 07/23/2019; 8 minutes to read +6; In this article. I think it is also possible to create a jacocoTestReport Task and then create code coverage. x and using the latest version of Jacoco!. jacoco-maven-plugin is defined is the project's pom. If you want to use it to compile JavaScript code it has to be explicitly defined. As we know unfortunately Maven has no out of the box support for different test types. Maven + Code coverage report integration. It brings code coverage analysis directly into the Eclipse workbench: Fast develop/test cycle: Launches from within the workbench like JUnit test runs can directly be analyzed for code coverage. I see the following in my build log: Here is the resulting jacoco. 0 to generate test code coverage reports (and checks) to the build. jacoco-coverage plugin allows Gradle build scripts to configure minimum Java Code Coverage thresholds for projects, packages, classes, and files. JaCoCo is a free code coverage library for Java, which has been created by the EclEmma team based on the lessons learned from using and integration existing libraries for many years. There are two options:. NET applications with OpenCover. There are two main streamlines in code coverage. The jacoco. JaCoCo is a free code coverage library for Java, which was created by the EclEmma team based on the lessons learned from using and integrating existing libraries for many years. Maven + Code coverage report integration. Develop healthier code using Codecov's leading, dedicated code coverage solution. 6, the Groovy based build tool, is Jacoco support. With Android plugin 3. Show more Show less. We approached measuring code coverage with 5 requirements:. Questions: I am developing apps using Android Studio. The default configuration puts jacoco. From within the module directory, I generate the exec files: mvn clean org. See how to implement an end-to-end testing scenario in this walkthrough using Jacoco agent, to ensure good code coverage and a quality application or software. I got a ant build. Your team should aim to have 100% coverage of your code base. In this post we will see how to work with Junit code coverage with JaCoCo, which is quite a new maven plug-in that provides the JaCoCo runtime agent to your tests and allows basic report creation. 0, new filtering options have been available and enabled that skip some code blocks that really do not need to be tested and do not need to be reported on in test coverage reports. But there is a nice little library that allows us to do it at the command line. NET Core, Ant, Maven, Gulp, Grunt also provide the option to publish code coverage data to the pipeline. If not just use the Demo project so you can have a preview. 5, jacoco code coverage work fine even when using espresso, dagger etc. My responsibilities and abilities with my team: *Leading the technical test planning and testing strategy. I was able to run the test code. Code coverage requirements can be specified for a project as a whole, for individual files, and for particular JaCoCo-specific types of coverage, e. code coverage details. /gradlew connectedChec. Specify how you want to process the coverage results. Download the Maven project - 4. Code coverage helps to answer these questions. I get the. , out of the box, as a code coverage engine for Maven projects, since Cobertura does not work with JDK 7 language constructs. Code Coverage. Experience with a code-coverage tool such as JaCoCo. It also includes functionality to include columns in Dashboards which displays the latest overall coverage numbers and links to the coverage report. If you are using these tasks, you do not need a separate Publish Code Coverage Results task in the pipeline. The main goal of Code Coverage is to detect when the Code Coverage goes below a specified percentage for the project, and know that something is wrong when it does. It looked interesting and I decided to give it a shot. Coverage column. My root build. It is usually used to. This topic is how to do the code coverage on. Note:This goal should be used as a Maven report. Job DescriptionWould you like to work in a collaborative environment at a state of the art facility…See this and similar jobs on LinkedIn. JaCoCo & EclEmma : Java Code Coverage Tutorial Tech Learnings. Have you tried using the Jacoco plugin for getting code coverage for your project? It is a good plugin giving you coverage based on your package or individual classes. The build fails if coverage drops below fixed limits (branch, instruction, and line)—"verification" in JaCoCo-speak. Hi, I am new to sonar. A cross platform code coverage library for. You should also consider whether an open source tool or a commercial tool is right for you. The Jacoco plugin for Jenkins offers an easy way to integrate a test coverage report in Jenkins. Hello, I have attempted to enable JaCoCo code coverage without success. Note: if you are using the babel-jest transformer and want to use an additional code preprocessor, keep in mind that when "transform" is overwritten in any way the babel-jest is not loaded automatically anymore. This post covers reporting code coverage using Maven's jacoco-maven-plugin, a. Those that have followed me over the years know that I'm big proponent of Unit Testing and Code Coverage. Code coverage report with JaCoCo. might take a look at our new code coverage library called JaCoCo. I just got this working on our repo recently. After successful execution of all the test cases I am. I am using jacoco-maven-plugin v0. but build gradle is through android studio in windows. - Involve in test plan and test strategy creation. Using JaCoCo’s command line interface tools, it is possible to generate code coverage execution reports for each test case – including an HTML report for consumption by humans. - Configuring Jenkins with SVN hooks/Poll SCM to automate the integration, when source code is pushed and notify the errors to developers. xmlReportPaths then it is not showing coverage. Previously, JaCoCo did not support the multi modules maven project, but with the latest version, it adds in the supports. with output=file and dumponexit=true, the coverage for all the applications comes after shutting down. As most tutorials out there are quite outdated, this one will give you a basic ground using the. Re: No code coverage in ant build Hi David, sorry for the delay, I haven't had access to my machine for the last couple of days. This post covers reporting code coverage using Maven's jacoco-maven-plugin, a. Since we are working with Java, using the project build tool is common sense. 8 and version 0. This tutorial shows how to measure and enforce code coverage with JaCoCo and its Gradle plugin, but the concepts are also valid for the JaCoCo Maven plugin. To submit feedback on the Maven Code Coverage plugin, post to the NetBeans forums or mailing lists, or log bugs in the bug tracker, category projects/Maven. Our test cases need to run in the container, and now jacoco could only collecte the data of these test cases but not XTS codes. This article presents an example Maven project to get started with unit test code coverage by Jacoco. This is very helpful, so we can evaluate the quality of our code, how many of our code has been and have not been covered by the Unit Test. Code coverage setup. Now when we have unit-, android- and robolectric-tests covered, we want to unify them in order to understand whether our test coverage meets project requirements as well as better analyze code quality. During a build a JaCoCo agent attaches itself to a JVM. The plugin is part of the standard distribution so there's no need to install anything to use the plugin. Warning: The preferred way for code coverage analysis with JaCoCo is on-the-fly instrumentation. EMMA open-source toolkit. At the moment, we're having a problem with code that JaCoCo reports as not being covered but there clearly is a test that executes it. It is always nice to get some statistics on the code coverage by the unit tests, and Jacoco is one of the most popular code coverage frameworks. You should try to have a high branch coverage of your unit tests. The JaCoCo plugin provides code coverage metrics for Java code via integration with JaCoCo. exec However, when I run the EclEmma coverage (which uses JaCoCo) inside of Eclipse, I get full coverage reports with these Groovy tests. 4 in Eclipse does not produce any code coverage Tag: eclipse , jacoco , websphere-liberty I am trying to use JaCoCo for code coverage. Online Help Keyboard Shortcuts Feed Builder What’s new. [jacoco:report] Execution data for class xxxxx does not match. I did some research and found the JaCoCo code coverage library. JaCoCo is usually integrated in the build itself via Maven or Ant to create the report. Currently it supports instruction, branch, line, method and class coverage which is pretty enough you can expect from this kind of tool. But it doesn't seem to work at all. If you want to use it to compile JavaScript code it has to be explicitly defined. I just removed the @Config annotation from the Robolectric test, as it isn't needed anymore. Users uploading Code Coverage data in Jacoco or Cobertura formats to Visual Studio Team Services will be able to browse the html report generated by the tool in the Code Coverage tab. 1 To see the output go to target directory and open index. To perform some simple experiments, download Esprima, Escodegen and a raw copy of instrumenter. I couldn't find a suitable solution, although I came to know about the Jacoco code coverage tool and tried some samples with the use of the Jacoco Jenkins plugin, there is no success. NET applications with OpenCover. JUnit tests are really helpful to verify logic of modules before starting integration testing. I get the. Code coverage report with JaCoCo. Code coverage helps to answer these questions. If you are here, you probably know what code coverage is, and what Robotframework is either. Jacoco counts this in its code coverage report as there is a possibility a new instance of DateTimeContstants could be created. In some cases the Java compiler creates extra byte code for a particular line of source code. Researched and added code coverage analysis to build (EclEmma - JaCoCo). Jenkins will generate the trend report of coverage and some other statistics. Demands [none]. So it turns out that you have to have at least one file with the. You will run JaCoCo code coverage using Maven. Unfortunately, the bytecode instrumentation might conflict with the bytecode instrumentations done by tools used to measure code coverage (e. xml which is generated by running the jacoco report generation, not just generating the *. We're going to use a sample program to explore how code coverage and cyclomatic complexity calculations are useful for making sure that Java code is properly tested with JaCoCo. The JUnit5 gradle plugin just does not work with Jacoco. The build has a post build action that collects the jacoco report - this is from the jacoco jenkins plugin. Important thing to understand is that the code coverage is not directly related with code quality. JaCoCo is a great open-source toolkit for code coverage measurements. I see the following in my build log: Here is the resulting jacoco. 5 Maven plugin. Note: if you are using the babel-jest transformer and want to use an additional code preprocessor, keep in mind that when "transform" is overwritten in any way the babel-jest is not loaded automatically anymore. EMMA distinguishes itself from other tools by going after a unique feature combination: support for large-scale enterprise software development while keeping individual developer's work fast and iterative. Client-side code coverage covers the code of integration tests (integration tests are typically written with spock + geb or spock + HttpBuilder, but actually it can be any JVM code that connects to your web-app). Re: [java code coverage] Jacoco SonarQube Executable Lines Logic Marc Hoffmann. c and c has c1, c2, c3, auto. The JaCoCo plugin provides code coverage metrics for Java code via integration with JaCoCo. Not only classes but also the project work assignments makes me to feel like working in a environment of a software firm ,which will eventually made me to come close to real world working scenario. It is always nice to get some statistics on the code coverage by the unit tests, and Jacoco is one of the most popular code coverage frameworks. Android Studio generates HTML coverage reports only for instrumentation test. Creates a code coverage report for tests of a single project in multiple formats (HTML, XML, and CSV). More information can be found on the JaCoCo website (see below) One additional advantage of JaCoCo is that its mechanism is not tool-specific, it can be used for any java program by configuring the VM. In addition execution data is collected from the project itself. JaCoCo is a free Java code coverage library distributed under the Eclipse Public License. Very great post! Thank you for the help! If you want to add separate coverage ration for unit and integration tests you can do it by adding the below two new executions to the plugin. Project coverage is set to 0% as no JaCoCo execution data has been dumped: C:\Users\fiddlerpianist\Projects\emailnotifier\target\jacoco. I have already seen the following links. The fact-checkers, whose work is more and more important for those who prefer facts over lies, police the line between fact and falsehood on a day-to-day basis, and do a great job. Today, my small contribution is to pass along a very good overview that reflects on one of Trump’s favorite overarching falsehoods. Namely: Trump describes an America in which everything was going down the tubes under  Obama, which is why we needed Trump to make America great again. And he claims that this project has come to fruition, with America setting records for prosperity under his leadership and guidance. “Obama bad; Trump good” is pretty much his analysis in all areas and measurement of U.S. activity, especially economically. Even if this were true, it would reflect poorly on Trump’s character, but it has the added problem of being false, a big lie made up of many small ones. Personally, I don’t assume that all economic measurements directly reflect the leadership of whoever occupies the Oval Office, nor am I smart enough to figure out what causes what in the economy. But the idea that presidents get the credit or the blame for the economy during their tenure is a political fact of life. Trump, in his adorable, immodest mendacity, not only claims credit for everything good that happens in the economy, but tells people, literally and specifically, that they have to vote for him even if they hate him, because without his guidance, their 401(k) accounts “will go down the tubes.” That would be offensive even if it were true, but it is utterly false. The stock market has been on a 10-year run of steady gains that began in 2009, the year Barack Obama was inaugurated. But why would anyone care about that? It’s only an unarguable, stubborn fact. Still, speaking of facts, there are so many measurements and indicators of how the economy is doing, that those not committed to an honest investigation can find evidence for whatever they want to believe. Trump and his most committed followers want to believe that everything was terrible under Barack Obama and great under Trump. That’s baloney. Anyone who believes that believes something false. And a series of charts and graphs published Monday in the Washington Post and explained by Economics Correspondent Heather Long provides the data that tells the tale. The details are complicated. Click through to the link above and you’ll learn much. But the overview is pretty simply this: The U.S. economy had a major meltdown in the last year of the George W. Bush presidency. Again, I’m not smart enough to know how much of this was Bush’s “fault.” But he had been in office for six years when the trouble started. So, if it’s ever reasonable to hold a president accountable for the performance of the economy, the timeline is bad for Bush. GDP growth went negative. Job growth fell sharply and then went negative. Median household income shrank. The Dow Jones Industrial Average dropped by more than 5,000 points! U.S. manufacturing output plunged, as did average home values, as did average hourly wages, as did measures of consumer confidence and most other indicators of economic health. (Backup for that is contained in the Post piece I linked to above.) Barack Obama inherited that mess of falling numbers, which continued during his first year in office, 2009, as he put in place policies designed to turn it around. By 2010, Obama’s second year, pretty much all of the negative numbers had turned positive. By the time Obama was up for reelection in 2012, all of them were headed in the right direction, which is certainly among the reasons voters gave him a second term by a solid (not landslide) margin. Basically, all of those good numbers continued throughout the second Obama term. The U.S. GDP, probably the single best measure of how the economy is doing, grew by 2.9 percent in 2015, which was Obama’s seventh year in office and was the best GDP growth number since before the crash of the late Bush years. GDP growth slowed to 1.6 percent in 2016, which may have been among the indicators that supported Trump’s campaign-year argument that everything was going to hell and only he could fix it. During the first year of Trump, GDP growth grew to 2.4 percent, which is decent but not great and anyway, a reasonable person would acknowledge that — to the degree that economic performance is to the credit or blame of the president — the performance in the first year of a new president is a mixture of the old and new policies. In Trump’s second year, 2018, the GDP grew 2.9 percent, equaling Obama’s best year, and so far in 2019, the growth rate has fallen to 2.1 percent, a mediocre number and a decline for which Trump presumably accepts no responsibility and blames either Nancy Pelosi, Ilhan Omar or, if he can swing it, Barack Obama. I suppose it’s natural for a president to want to take credit for everything good that happens on his (or someday her) watch, but not the blame for anything bad. Trump is more blatant about this than most. If we judge by his bad but remarkably steady approval ratings (today, according to the average maintained by 538.com, it’s 41.9 approval/ 53.7 disapproval) the pretty-good economy is not winning him new supporters, nor is his constant exaggeration of his accomplishments costing him many old ones). I already offered it above, but the full Washington Post workup of these numbers, and commentary/explanation by economics correspondent Heather Long, are here. On a related matter, if you care about what used to be called fiscal conservatism, which is the belief that federal debt and deficit matter, here’s a New York Times analysis, based on Congressional Budget Office data, suggesting that the annual budget deficit (that’s the amount the government borrows every year reflecting that amount by which federal spending exceeds revenues) which fell steadily during the Obama years, from a peak of $1.4 trillion at the beginning of the Obama administration, to $585 billion in 2016 (Obama’s last year in office), will be back up to $960 billion this fiscal year, and back over $1 trillion in 2020. (Here’s the New York Times piece detailing those numbers.) Trump is currently floating various tax cuts for the rich and the poor that will presumably worsen those projections, if passed. As the Times piece reported: