GH-294: Integration test compiling specific class names

Author: ascopes

java-compiler-testing/src/test/java/io/github/ascopes/jct/tests/integration/CompilingSpecificClassesIntegrationTest.java

@@ -0,0 +1,35 @@
+package io.github.ascopes.jct.tests.integration;
+
+import static io.github.ascopes.jct.assertions.JctAssertions.assertThat;
+
+import io.github.ascopes.jct.compilers.JctCompiler;
+import io.github.ascopes.jct.junit.JavacCompilerTest;
+import io.github.ascopes.jct.workspaces.Workspaces;
+import org.junit.jupiter.api.DisplayName;
+
+/**
+ * Integration tests that test the compilation of specific classes only.
+ *
+ * @author Ashley Scopes
+ */
+@DisplayName("Compiling specific classes integration tests")
+class CompilingSpecificClassesIntegrationTest {
+  @DisplayName("Only the classes that I specify get compiled")
+  @JavacCompilerTest
+  void onlyTheClassesSpecifiedGetCompiled(JctCompiler<?, ?> compiler) {
+    try (var workspace = Workspaces.newWorkspace()) {
+      workspace
+          .createSourcePathPackage()
+          .copyContentsFrom("src", "test", "resources", "integration", "specificclasses");
+
+      var compilation = compiler.compile(workspace, "Fibonacci", "HelloWorld");
+
+      assertThat(compilation)
+          .isSuccessfulWithoutWarnings()
+          .classOutput()
+          .packages()
+          .allFilesExist("Fibonacci.class", "HelloWorld.class")
+          .fileDoesNotExist("Sum.class");
+    }
+  }
+}

java-compiler-testing/src/test/resources/integration/specificclasses/Fibonacci.java

@@ -0,0 +1,25 @@
+import static java.math.BigInteger.ONE;
+import static java.math.BigInteger.ZERO;
+
+import java.math.BigInteger;
+
+public class Fibonacci {
+  public static void main(String[] args) {
+    if (args.length != 1) {
+      System.out.println("USAGE: java Fibonacci <n>");
+      System.out.println("    <n>    Fibonacci number to generate");
+    }
+
+    BigInteger n = new BigInteger(args[0], 10);
+    BigInteger a = ZERO;
+    BigInteger b = ONE;
+
+    for (BigInteger i = ZERO; i.compareTo(n) < 0; i = i.add(ONE)) {
+      BigInteger oldB = b;
+      b = a.add(b);
+      a = oldB;
+    }
+
+    System.out.println(a);
+  }
+}

java-compiler-testing/src/test/resources/integration/specificclasses/HelloWorld.java

@@ -0,0 +1,5 @@
+public class HelloWorld {
+  public static void main(String[] args) {
+    System.out.println("Hello, World!");
+  }
+}

java-compiler-testing/src/test/resources/integration/specificclasses/Sum.java

@@ -0,0 +1,9 @@
+public class Sum {
+  public static void main(String[] args) {
+    long sum = 0;
+    for (String arg : args) {
+      sum += Integer.parseInt(arg);
+    }
+    System.out.println(sum);
+  }
+}