Add tests for a couple of methods of TypeRenderUtils

2026-10-23 15:55:25 +00:00 · 2018-10-05 23:13:23 +08:00
parent d98af5cc5a b267a234d3
commit 378e854bfb
1 changed files with 117 additions and 0 deletions
@@ -0,0 +1,117 @@
+package com.taobao.arthas.core.util;
+
+import org.junit.Test;
+
+import java.io.Serializable;
+
+import static org.hamcrest.CoreMatchers.equalTo;
+import static org.hamcrest.CoreMatchers.is;
+import static org.junit.Assert.assertThat;
+
+public class TypeRenderUtilsTest {
+
+
+    public class TestClass implements Serializable {
+        private int testField;
+        public char anotherTestField;
+
+        public int testMethod(int i, boolean b) {
+            return 0;
+        }
+
+        public void anotherTestMethod() throws NullPointerException {
+
+        }
+    }
+
+    @Test
+    public void testDrawInterface() {
+        assertThat(TypeRenderUtils.drawInterface(String.class), is(equalTo("java.io.Serializable,java.lang.Comparable,java.lang.CharSequence")));
+        assertThat(TypeRenderUtils.drawInterface(TestClass.class), is(equalTo("java.io.Serializable")));
+        assertThat(TypeRenderUtils.drawInterface(Serializable.class), is(equalTo("")));
+    }
+
+    @Test
+    public void testDrawParametersForMethod() throws NoSuchMethodException {
+        Class[] classesOfParameters = new Class[2];
+        classesOfParameters[0] = int.class;
+        classesOfParameters[1] = boolean.class;
+
+        assertThat(TypeRenderUtils.drawParameters(TestClass.class.getMethod("testMethod", classesOfParameters)), is(equalTo("int\nboolean")));
+        assertThat(TypeRenderUtils.drawParameters(TestClass.class.getMethod("anotherTestMethod")), is(equalTo("")));
+
+        assertThat(TypeRenderUtils.drawParameters(String.class.getMethod("charAt", int.class)), is(equalTo("int")));
+        assertThat(TypeRenderUtils.drawParameters(String.class.getMethod("isEmpty")), is(equalTo("")));
+    }
+
+    @Test(expected = NoSuchMethodException.class)
+    public void testDrawParametersForMethodThrowsException() throws NoSuchMethodException {
+        assertThat(TypeRenderUtils.drawParameters(TestClass.class.getMethod("method")), is(equalTo("")));
+    }
+
+    @Test
+    public void testDrawParametersForConstructor() throws NoSuchMethodException {
+        Class[] classesOfParameters = new Class[3];
+        classesOfParameters[0] = char[].class;
+        classesOfParameters[1] = int.class;
+        classesOfParameters[2] = int.class;
+
+        assertThat(TypeRenderUtils.drawParameters(String.class.getConstructor(classesOfParameters)), is(equalTo("[]\nint\nint")));
+        assertThat(TypeRenderUtils.drawParameters(String.class.getConstructor()), is(equalTo("")));
+    }
+
+    @Test(expected = NoSuchMethodException.class)
+    public void testDrawParametersForConstructorThrowsException() throws NoSuchMethodException {
+        assertThat(TypeRenderUtils.drawParameters(TestClass.class.getConstructor()), is(equalTo("")));
+    }
+
+    @Test
+    public void testDrawReturn() throws NoSuchMethodException {
+        Class[] classesOfParameters = new Class[2];
+        classesOfParameters[0] = int.class;
+        classesOfParameters[1] = boolean.class;
+
+        assertThat(TypeRenderUtils.drawReturn(TestClass.class.getMethod("testMethod", classesOfParameters)), is(equalTo("int")));
+        assertThat(TypeRenderUtils.drawReturn(TestClass.class.getMethod("anotherTestMethod")), is(equalTo("void")));
+
+        assertThat(TypeRenderUtils.drawReturn(String.class.getMethod("isEmpty")), is(equalTo("boolean")));
+    }
+
+    @Test(expected = NoSuchMethodException.class)
+    public void testDrawReturnThrowsException() throws NoSuchMethodException {
+        assertThat(TypeRenderUtils.drawReturn(TestClass.class.getMethod("method")), is(equalTo("")));
+    }
+
+    @Test
+    public void testDrawExceptionsForMethod() throws NoSuchMethodException {
+        Class[] classesOfParameters = new Class[2];
+        classesOfParameters[0] = int.class;
+        classesOfParameters[1] = boolean.class;
+
+        assertThat(TypeRenderUtils.drawExceptions(TestClass.class.getMethod("testMethod", classesOfParameters)), is(equalTo("")));
+        assertThat(TypeRenderUtils.drawExceptions(TestClass.class.getMethod("anotherTestMethod")), is(equalTo("java.lang.NullPointerException")));
+
+        assertThat(TypeRenderUtils.drawExceptions(String.class.getMethod("getBytes", String.class)), is(equalTo("java.io.UnsupportedEncodingException")));
+    }
+
+    @Test(expected = NoSuchMethodException.class)
+    public void testDrawExceptionsForMethodThrowsException() throws NoSuchMethodException {
+        assertThat(TypeRenderUtils.drawExceptions(TestClass.class.getMethod("method")), is(equalTo("")));
+    }
+
+    @Test
+    public void testDrawExceptionsForConstructor() throws NoSuchMethodException {
+        Class[] classesOfConstructorParameters = new Class[2];
+        classesOfConstructorParameters[0] = byte[].class;
+        classesOfConstructorParameters[1] = String.class;
+
+        assertThat(TypeRenderUtils.drawExceptions(String.class.getConstructor()), is(equalTo("")));
+        assertThat(TypeRenderUtils.drawExceptions(String.class.getConstructor(classesOfConstructorParameters)), is(equalTo("java.io.UnsupportedEncodingException")));
+    }
+
+    @Test(expected = NoSuchMethodException.class)
+    public void testDrawExceptionsForConstructorThrowsException() throws NoSuchMethodException {
+        assertThat(TypeRenderUtils.drawExceptions(TestClass.class.getConstructor()), is(equalTo("")));
+    }
+
+}