Specifying builder.content(String) prevents any possible I/O errors, …

…as the content isn't read anymore.

truffle/com.oracle.truffle.api.test/src/com/oracle/truffle/api/source/SourceBuilderTest.java

@@ -156,8 +156,18 @@ public void assignMimeTypeAndIdentityForVirtualFile() throws IOException {
         assertEquals("Source with different MIME type has the same URI", s1.getURI(), s2.getURI());
     }
 
-    /* Test currently fails on Sparc. */
-    @Ignore
+    @Test
+    public void noIOWhenContentSpecified() {
+        File file = new File("some.js");
+
+        String text = "// Hello";
+
+        Source source = Source.newFromFile(file).content(text).build();
+        assertEquals("The content has been changed", text, source.getCode());
+        assertEquals("application/javascript", source.getMimeType());
+        assertEquals("some.js", source.getName());
+    }
+
     @Test
     public void assignMimeTypeAndIdentityForURL() throws IOException {
         File file = File.createTempFile("Hello", ".java");

truffle/com.oracle.truffle.api/src/com/oracle/truffle/api/source/Source.java

@@ -162,7 +162,7 @@ public static Source find(String name) {
      * <p>
      * The system tries to deduce appropriate {@link Source#getMimeType()} by consulting registered
      * {@link FileTypeDetector file type detectors}.
-     * 
+     *
      * @param file the location of the file to load content from
      * @return new instance of builder
      * @since 0.15
@@ -1124,12 +1124,14 @@ public Builder<R, E> internal() {
          * {@link SourceSnippets#fromURLWithOwnContent}
          *
          * @param code the code to be available via {@link Source#getCode()}
-         * @return instance of this builder
+         * @return instance of this builder - which's {@link #build()} method
+         *   no longer throws an {@link IOException}
          * @since 0.15
          */
-        public Builder<R, E> content(String code) {
+        @SuppressWarnings("unchecked")
+        public Builder<R, RuntimeException> content(String code) {
             this.content = code;
-            return this;
+            return (Builder<R, RuntimeException>) this;
         }
 
         Builder<R, E> content(byte[] arr, int offset, int length, Charset encoding) {
@@ -1173,6 +1175,9 @@ public R build() throws E {
                 if (type == null) {
                     throw new IllegalStateException("Unknown mime type for " + origin);
                 }
+                if (content != null) {
+                    holder.code = content;
+                }
                 SourceImpl ret = new SourceImpl(holder, type, name, internal);
                 return (R) ret;
             } catch (IOException ex) {