2 files changed, 64 insertions, 0 deletions
diff --git a/src/test/java/org/zwobble/hobgoblin/compiler/output/lang/java/JavaWriterTests.java b/src/test/java/org/zwobble/hobgoblin/compiler/output/lang/java/JavaWriterTests.java
index 4ce2ea1..8b60341 100644
--- a/src/test/java/org/zwobble/hobgoblin/compiler/output/lang/java/JavaWriterTests.java
+++ b/src/test/java/org/zwobble/hobgoblin/compiler/output/lang/java/JavaWriterTests.java
@@ -1456,6 +1456,23 @@ public class JavaWriterTests {
         assertThat(string, equalTo("one.two"));
     }
 
+    // === Instanceof expressions ===
+
+    @Test
+    public void instanceofExpression() throws IOException {
+        var java = JavaInstanceofExpression.arbitrary()
+            .withValue(JavaRef.arbitrary().withName(JavaIdentifier.of("a")))
+            .withPattern(JavaPattern.arbitrary()
+                .withType(JavaTypeRef.topLevel(JavaPackageName.EMPTY, JavaIdentifier.of("B")))
+                .withVariableName(JavaIdentifier.of("b"))
+            )
+            .build();
+
+        var string = write(writer -> writer.writeTopLevelExpression(java));
+
+        assertThat(string, equalTo("a instanceof B b"));
+    }
+
     // === Integer literals ===
 
     @Test
diff --git a/src/test/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaInstanceofExpressionMatcher.java b/src/test/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaInstanceofExpressionMatcher.java
new file mode 100644
index 0000000..959ebb2
--- /dev/null
+++ b/src/test/java/org/zwobble/hobgoblin/compiler/output/lang/java/ast/JavaInstanceofExpressionMatcher.java
@@ -0,0 +1,47 @@
+// Generated by hobgoblin.
+
+package org.zwobble.hobgoblin.compiler.output.lang.java.ast;
+
+// Custom area start: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaInstanceofExpressionMatcher imports
+// Custom area end: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaInstanceofExpressionMatcher imports
+
+public class JavaInstanceofExpressionMatcher implements org.zwobble.precisely.Matcher<java.lang.Object> {
+    public static org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaInstanceofExpressionMatcher isJavaInstanceofExpression() {
+        return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaInstanceofExpressionMatcher(java.util.List.of());
+    }
+
+    private final java.util.List<org.zwobble.precisely.Matcher<? super org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaInstanceofExpression>> submatchers;
+
+    private JavaInstanceofExpressionMatcher(
+        java.util.List<org.zwobble.precisely.Matcher<? super org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaInstanceofExpression>> submatchers
+    ) {
+        this.submatchers = submatchers;
+    }
+
+    public org.zwobble.precisely.MatchResult match(java.lang.Object actual) {
+        return this.toMatcher().match(actual);
+    }
+
+    public org.zwobble.precisely.TextTree describe() {
+        return this.toMatcher().describe();
+    }
+
+    private org.zwobble.precisely.Matcher<java.lang.Object> toMatcher() {
+        return org.zwobble.precisely.Matchers.instanceOf(org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaInstanceofExpression.class, this.submatchers);
+    }
+
+    public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaInstanceofExpressionMatcher withValue(org.zwobble.precisely.Matcher<? super org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaExpression> value) {
+        var submatchers = new java.util.ArrayList<org.zwobble.precisely.Matcher<? super org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaInstanceofExpression>>(this.submatchers);
+        submatchers.add(org.zwobble.precisely.Matchers.has("value", org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaInstanceofExpression::value, value));
+        return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaInstanceofExpressionMatcher(submatchers);
+    }
+
+    public org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaInstanceofExpressionMatcher withPattern(org.zwobble.precisely.Matcher<? super org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaPattern> pattern) {
+        var submatchers = new java.util.ArrayList<org.zwobble.precisely.Matcher<? super org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaInstanceofExpression>>(this.submatchers);
+        submatchers.add(org.zwobble.precisely.Matchers.has("pattern", org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaInstanceofExpression::pattern, pattern));
+        return new org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaInstanceofExpressionMatcher(submatchers);
+    }
+
+    // Custom area start: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaInstanceofExpressionMatcher body
+    // Custom area end: org.zwobble.hobgoblin.compiler.output.lang.java.ast.JavaInstanceofExpressionMatcher body
+}