Clean up .spv files generated during testing (#1144)

The glslangValidator tool always generates a .spv file when validating
a shader in Vulkan mode. This change causes the tests that invoke the
validator in this manner to subsequently delete such files.

Author: afd

generator/src/test/java/com/graphicsfuzz/generator/tool/GenerateShaderFamilyTest.java

@@ -32,6 +32,7 @@
 import java.util.List;
 import net.sourceforge.argparse4j.inf.ArgumentParserException;
 import org.apache.commons.io.FileUtils;
+import org.junit.After;
 import org.junit.Ignore;
 import org.junit.Rule;
 import org.junit.Test;
@@ -42,6 +43,18 @@ public class GenerateShaderFamilyTest {
   @Rule
   public TemporaryFolder temporaryFolder = new TemporaryFolder();
 
+  @After
+  public void deleteTemporarySpirvFiles() {
+    // In Vulkan mode, glslangValidator will create SPIR-V files. This cleans them up after each
+    // test.
+    for (String kind : Arrays.asList("vert", "frag", "comp")) {
+      final File tempFile = new File(kind + ".spv");
+      if (tempFile.exists()) {
+        tempFile.delete();
+      }
+    }
+  }
+
   @Test
   public void testGenerateSmall100ShaderFamily() throws Exception {
     final String samplesSubdir = "100";

generator/src/test/java/com/graphicsfuzz/generator/tool/GlslGenerateTest.java

@@ -39,6 +39,7 @@
 import java.util.List;
 import net.sourceforge.argparse4j.inf.ArgumentParserException;
 import org.apache.commons.io.FileUtils;
+import org.junit.After;
 import org.junit.Rule;
 import org.junit.Test;
 import org.junit.rules.TemporaryFolder;
@@ -48,6 +49,18 @@ public class GlslGenerateTest {
   @Rule
   public TemporaryFolder temporaryFolder = new TemporaryFolder();
 
+  @After
+  public void deleteTemporarySpirvFiles() {
+    // In Vulkan mode, glslangValidator will create SPIR-V files. This cleans them up after each
+    // test.
+    for (String kind : Arrays.asList("vert", "frag", "comp")) {
+      final File tempFile = new File(kind + ".spv");
+      if (tempFile.exists()) {
+        tempFile.delete();
+      }
+    }
+  }
+
   @Test
   public void testSmall100ShaderFamilies() throws Exception {
     final String references = Paths.get(ToolPaths.getShadersDirectory(),