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 +1,50 @@
+/*
+ * Copyright (C) 2022 - 2023, the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+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

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+/*
+ * Copyright (C) 2022 - 2023, the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+import static java.math.BigInteger.ONE;
+import static java.math.BigInteger.ZERO;
+
+import java.math.BigInteger;
+
+/**
+ * Command line app to calculate the nth number of the fibonacci sequence.
+ */
+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 +1,24 @@
+/*
+ * Copyright (C) 2022 - 2023, the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * Command line app that says hello to me.
+ */
+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 +1,28 @@
+/*
+ * Copyright (C) 2022 - 2023, the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * Command line app that sums together given integers.
+ */
+public class Sum {
+  public static void main(String[] args) {
+    long sum = 0;
+    for (String arg : args) {
+      sum += Integer.parseInt(arg);
+    }
+    System.out.println(sum);
+  }
+}