1 files changed, 140 insertions, 0 deletions
diff --git a/vespajlib/src/test/java/com/yahoo/text/ExpressionFormatterTest.java b/vespajlib/src/test/java/com/yahoo/text/ExpressionFormatterTest.java
new file mode 100644
index 00000000000..6dfb2e6fc8a
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+++ b/vespajlib/src/test/java/com/yahoo/text/ExpressionFormatterTest.java
@@ -0,0 +1,140 @@
+// Copyright 2019 Oath Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+package com.yahoo.text;
+
+import org.junit.Test;
+
+import static org.junit.Assert.assertEquals;
+
+/**
+ * @author bratseth
+ */
+public class ExpressionFormatterTest {
+
+    @Test
+    public void testBasic() {
+        String expected =
+                "foo(\n" +
+                "  bar(\n" +
+                "    baz(\n" +
+                "    )\n" +
+                "  )\n" +
+                ")\n";
+        assertPrettyPrint(expected, "foo(bar(baz()))");
+    }
+
+    @Test
+    public void testArgument() {
+        String expected =
+                "foo(\n" +
+                "  bar(\n" +
+                "    baz(\n" +
+                "      hello world\n" +
+                "    )\n" +
+                "  )\n" +
+                ")\n";
+        assertPrettyPrint(expected, "foo(bar(baz(hello world)))");
+    }
+
+    @Test
+    public void testMultipleArguments() {
+        String expected =
+                "foo(\n" +
+                "  bar(\n" +
+                "    baz(\n" +
+                "      hello world,\n" +
+                "      37\n" +
+                "    )\n" +
+                "  )\n" +
+                ")\n";
+        assertPrettyPrint(expected, "foo(bar(baz(hello world,37)))");
+    }
+
+    @Test
+    public void testUnmatchedStart() {
+        String expected =
+                "foo(\n" +
+                "  (\n" +
+                "    bar(\n" +
+                "      baz(\n" +
+                "      )\n" +
+                "    )\n" +
+                "  )\n";
+        assertPrettyPrint(expected, "foo((bar(baz()))");
+    }
+
+    @Test
+    public void testUnmatchedEnd() {
+        String expected =
+                "foo(\n" +
+                "  bar(\n" +
+                "    baz(\n" +
+                "    )\n" +
+                "  )\n" +
+                ")\n" +
+                ")\n";
+        assertPrettyPrint(expected, "foo(bar(baz())))");
+    }
+
+    @Test
+    public void testNoParenthesis() {
+        String expected =
+                "foo bar baz";
+        assertPrettyPrint(expected, "foo bar baz");
+    }
+
+    @Test
+    public void testEmpty() {
+        String expected =
+                "";
+        assertPrettyPrint(expected, "");
+    }
+
+    @Test
+    public void test2ColumnMode() {
+        String expected =
+                "1:  foo(\n" +
+                "      bar(\n" +
+                "        baz(\n" +
+                "2:        hello world\n" +
+                "        )\n" +
+                "t(o   )\n" +
+                "    )\n";
+        ExpressionFormatter pp = ExpressionFormatter.inTwoColumnMode(3);
+        assertEquals(expected, pp.format("\t1:\tfoo(bar(baz(\t2:\thello world)\tt(o)@olong:\t))"));
+    }
+
+    @Test
+    public void test2ColumnModeMultipleArguments() {
+        String expected =
+                "1:  foo(\n" +
+                "      bar(\n" +
+                "        baz(\n" +
+                "2:        hello world,\n" +
+                "3:        37\n" +
+                "        )\n" +
+                "t(o   )\n" +
+                "    )\n";
+        ExpressionFormatter pp = ExpressionFormatter.inTwoColumnMode(3);
+        assertEquals(expected, pp.format("\t1:\tfoo(bar(baz(\t2:\thello world,\t3:\t37)\tt(o)@olong:\t))"));
+    }
+
+    @Test
+    public void test2ColumnModeMultipleArgumentsWithSpaces() {
+        String expected =
+                "1:  foo(\n" +
+                "      bar(\n" +
+                "        baz(\n" +
+                "2:        hello world,\n" +
+                "3:        37\n" +
+                "        )\n" +
+                "t(o   )\n" +
+                "    )\n";
+        ExpressionFormatter pp = ExpressionFormatter.inTwoColumnMode(3);
+        assertEquals(expected, pp.format("\t1:\tfoo(bar(baz(\t2:\thello world, \t3:\t37)\tt(o)@olong:\t))"));
+    }
+
+    private void assertPrettyPrint(String expected, String expression) {
+        assertEquals(expected, ExpressionFormatter.on(expression));
+    }
+
+}