devonfw#1024: added tests of WindowsHelperImpl

cli/src/main/java/com/devonfw/tools/ide/os/WindowsHelper.java

@@ -35,5 +35,4 @@ static WindowsHelper get(IdeContext context) {
     // IdeContext API is already too large
     return ((AbstractIdeContext) context).getWindowsHelper();
   }
-
 }

cli/src/main/java/com/devonfw/tools/ide/os/WindowsHelperImpl.java

@@ -44,6 +44,17 @@ public String getRegistryValue(String path, String key) {
 
     ProcessResult result = this.context.newProcess().executable("reg").addArgs("query", path, "/v", key).run(ProcessMode.DEFAULT_CAPTURE);
     List<String> out = result.getOut();
+    return retrieveRegString(key, out);
+  }
+
+  /**
+   * Parses the result of a registry query and outputs the given key.
+   *
+   * @param key the key to look for.
+   * @param out List of keys from registry query result.
+   * @return the registry value.
+   */
+  protected String retrieveRegString(String key, List<String> out) {
     for (String line : out) {
       int i = line.indexOf(key);
       if (i >= 0) {

cli/src/test/java/com/devonfw/tools/ide/context/AbstractIdeTestContext.java

@@ -293,4 +293,7 @@ protected Path getIdeRootPathFromEnv() {
     return null;
   }
 
+  public void setUserEnvironmentVariable(String userEnvironmentVariable) {
+
+  }
 }

cli/src/test/java/com/devonfw/tools/ide/os/WindowsHelperImplTest.java

@@ -0,0 +1,51 @@
+package com.devonfw.tools.ide.os;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import org.junit.jupiter.api.Test;
+
+import com.devonfw.tools.ide.context.AbstractIdeContextTest;
+import com.devonfw.tools.ide.context.AbstractIdeTestContext;
+import com.devonfw.tools.ide.context.IdeSlf4jContext;
+
+/**
+ * Tests for {@link WindowsHelperImpl}.
+ */
+public class WindowsHelperImplTest extends AbstractIdeContextTest {
+
+  /**
+   * Tests if the USER_PATH registry entry can be parsed properly.
+   */
+  @Test
+  public void testWindowsHelperParseRegString() {
+    // arrange
+    AbstractIdeTestContext context = new IdeSlf4jContext();
+    WindowsHelperImpl helper = new WindowsHelperImpl(context);
+    List<String> output = new ArrayList<>();
+    output.add("");
+    output.add("HKEY_CURRENT_USER\\Environment");
+    output.add("    PATH    REG_SZ    D:\\projects\\_ide\\installation\\bin;");
+    output.add("");
+    // act
+    String regString = helper.retrieveRegString("PATH", output);
+    // assert
+    assertThat(regString).isEqualTo("D:\\projects\\_ide\\installation\\bin;");
+  }
+
+  /**
+   * Tests if an empty list of outputs will result in null.
+   */
+  @Test
+  public void testWindowsHelperParseEmptyRegStringReturnsNull() {
+    // arrange
+    AbstractIdeTestContext context = new IdeSlf4jContext();
+    WindowsHelperImpl helper = new WindowsHelperImpl(context);
+    List<String> output = new ArrayList<>();
+    // act
+    String regString = helper.retrieveRegString("PATH", output);
+    // assert
+    assertThat(regString).isNull();
+  }
+
+}

cli/src/test/resources/ide-projects/basic/project/home/environment.properties

@@ -1,2 +1,4 @@
 # if this file is present, it will replace and mock System.getenv in the text context
-PATH="/usr/bin:${IDE_ROOT}/_ide/bin"
+#PATH="/usr/bin:${IDE_ROOT}/_ide/bin"
+PATH=${IDE_ROOT}/_ide/bin
+