Set default minimum JMeter version to 5.5 for compatibility tests

.github/workflows/ci-build.yaml

@@ -10,6 +10,13 @@ concurrency:
 jobs:
   build:
     runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        # 5.5 is the minimum supported JMeter version, 5.6.3 the latest; both are exercised
+        # end-to-end (unit + HTTP parity regression tests) since ApacheJMeter_* are provided-scope
+        # and the same compiled plugin must behave correctly against either at runtime.
+        jmeter_version: ["5.5", "5.6.3"]
     steps:
       - name: Checkout
         uses: actions/checkout@v5
@@ -21,14 +28,17 @@ jobs:
           java-version: "17"
           cache: maven
 
-      - name: Build and test
-        run: xvfb-run -a mvn -U --batch-mode clean install
+      - name: Build and test (JMeter ${{ matrix.jmeter_version }})
+        run: >-
+          xvfb-run -a mvn -U --batch-mode
+          -Djmeter.version=${{ matrix.jmeter_version }}
+          clean install
 
       - name: Upload build artifacts
         if: always()
         uses: actions/upload-artifact@v6
         with:
-          name: ci-build-artifacts-${{ github.run_id }}
+          name: ci-build-artifacts-${{ matrix.jmeter_version }}-${{ github.run_id }}
           path: |
             target/jmeter-bzm-http2-*.jar
             target/jmeter-test

.github/workflows/ci-jmeter-compatibility.yaml

@@ -55,7 +55,13 @@ jobs:
         env:
           JMETER_PATH_BASE: ${{ github.workspace }}/.jmeter
         run: |
-          JMETER_VERSION=5.6.3 JMETER_PATH=$JMETER_PATH_BASE/5.6.3 sh testJMeter.sh
+          # Verify the built plugin jar loads and runs against every JMeter version we claim
+          # to support: 5.5 (minimum) through 5.6.3 (latest), regardless of which version the
+          # jar itself was compiled against (jmeter.version in pom.xml is provided-scope).
+          for JMETER_VERSION in 5.5 5.6.3; do
+            echo "=== Compatibility check against JMeter $JMETER_VERSION ==="
+            JMETER_VERSION=$JMETER_VERSION JMETER_PATH=$JMETER_PATH_BASE/$JMETER_VERSION sh testJMeter.sh
+          done
 
       - name: Upload compatibility artifacts on failure
         if: failure()

pom.xml

@@ -30,7 +30,7 @@
   <properties>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
-    <jmeter.version>5.4.1</jmeter.version>
+    <jmeter.version>5.5</jmeter.version>
     <jetty.version>12.1.11</jetty.version>
     <!-- Matches jetty-project ${brotli4j.version} for Jetty 12.1.11 -->
     <brotli4j.version>1.23.0</brotli4j.version>
@@ -50,11 +50,11 @@
       <scope>provided</scope>
     </dependency>
     <!-- Apache HttpClient for compilation (classes used in JettyCacheManager) -->
-    <!-- Using same version as JMeter 5.4.1 -->
+    <!-- Using same version as JMeter 5.5 (our minimum supported version) -->
     <dependency>
       <groupId>org.apache.httpcomponents</groupId>
       <artifactId>httpcore</artifactId>
-      <version>4.4.14</version>
+      <version>4.4.15</version>
       <scope>compile</scope>
     </dependency>
     <dependency>

src/test/java/com/blazemeter/jmeter/http2/core/HTTP2JettyClientFileProtocolSamplingTest.java

@@ -9,6 +9,7 @@
 import java.nio.charset.StandardCharsets;
 import java.nio.file.Files;
 import java.nio.file.Path;
+import org.apache.commons.lang3.StringUtils;
 import org.apache.jmeter.protocol.http.sampler.HTTPSampleResult;
 import org.apache.jmeter.protocol.http.util.HTTPConstants;
 import org.junit.After;
@@ -49,7 +50,15 @@ public void samplesLocalFileWithHardcodedGetMethodAndTextHtmlContentType() throw
     assertThat(sampled.isSuccessful()).isTrue();
     assertThat(sampled.getResponseCode()).isEqualTo("200");
     assertThat(sampled.getHTTPMethod()).isEqualTo(HTTPConstants.GET);
-    assertThat(sampled.getContentType()).isEqualTo("text/html");
+    // HTTP2Sampler.getContentEncoding()'s default is JMeter-version-dependent: 5.6.3 added a
+    // hardcoded UTF-8 schema default (HTTPSamplerBaseSchema), while 5.5 (our minimum supported
+    // version) leaves it blank until explicitly set. Read the sampler's actual runtime default
+    // instead of hardcoding the literal so this test passes on both supported versions.
+    String defaultContentEncoding = new HTTP2Sampler().getContentEncoding();
+    String expectedContentType = StringUtils.isBlank(defaultContentEncoding)
+        ? "text/html"
+        : "text/html; charset=" + defaultContentEncoding;
+    assertThat(sampled.getContentType()).isEqualTo(expectedContentType);
     assertThat(sampled.getResponseDataAsString()).isEqualTo(fileContent);
   }