From a3ff15484b1879f0abf54759dc1bb38ead7eb0ff Mon Sep 17 00:00:00 2001
From: dotasek <david.otasek@smilecdr.com>
Date: Fri, 14 Jan 2022 16:49:44 -0500
Subject: [PATCH] Tests for help display

---
 .../fhir/validation/cli/utils/Display.java    | 16 +++---
 .../validation/cli/utils/DisplayTests.java    | 54 +++++++++++++++++++
 2 files changed, 64 insertions(+), 6 deletions(-)
 create mode 100644 org.hl7.fhir.validation/src/test/java/org/hl7/fhir/validation/cli/utils/DisplayTests.java

diff --git a/org.hl7.fhir.validation/src/main/java/org/hl7/fhir/validation/cli/utils/Display.java b/org.hl7.fhir.validation/src/main/java/org/hl7/fhir/validation/cli/utils/Display.java
index 4ce9ec86f..8e94d4d61 100644
--- a/org.hl7.fhir.validation/src/main/java/org/hl7/fhir/validation/cli/utils/Display.java
+++ b/org.hl7.fhir.validation/src/main/java/org/hl7/fhir/validation/cli/utils/Display.java
@@ -37,15 +37,19 @@ public class Display {
   final static String CURLY_START = "\\{\\{";
   final static String CURLY_END = "\\}\\}";
 
+  final static String getMoustacheString(final String string) {
+    return CURLY_START + string + CURLY_END;
+  }
+
   final static String[][] PLACEHOLDERS = {
-    { CURLY_START + "XML_AND_JSON_FHIR_VERSIONS" + CURLY_END, "1.0, 1.4, 3.0, 4.0," + Constants.VERSION_MM },
-    { CURLY_START + "TURTLE_FHIR_VERSIONS" + CURLY_END, "3.0, 4.0, " + Constants.VERSION_MM },
-    { CURLY_START + "FHIR_MAJOR_VERSIONS" + CURLY_END, "1.0|1.4|3.0|" + VersionUtilities.CURRENT_VERSION},
-    { CURLY_START + "FHIR_MINOR_VERSIONS" + CURLY_END, "1.0.2|1.4.0|3.0.2|4.0.1|" + VersionUtilities.CURRENT_FULL_VERSION },
-    { CURLY_START + "FHIR_CURRENT_VERSION" + CURLY_END, VersionUtilities.CURRENT_VERSION},
+    { getMoustacheString("XML_AND_JSON_FHIR_VERSIONS"), "1.0, 1.4, 3.0, 4.0," + Constants.VERSION_MM },
+    { getMoustacheString("TURTLE_FHIR_VERSIONS"), "3.0, 4.0, " + Constants.VERSION_MM },
+    { getMoustacheString("FHIR_MAJOR_VERSIONS"), "1.0|1.4|3.0|" + VersionUtilities.CURRENT_VERSION},
+    { getMoustacheString("FHIR_MINOR_VERSIONS"), "1.0.2|1.4.0|3.0.2|4.0.1|" + VersionUtilities.CURRENT_FULL_VERSION },
+    { getMoustacheString("FHIR_CURRENT_VERSION"), VersionUtilities.CURRENT_VERSION},
   };
 
-  final static String replacePlaceholders(String input, String[][] placeholders) {
+  final static String replacePlaceholders(final String input, final String[][] placeholders) {
     String output = input;
     for (String[] placeholder : placeholders) {
       output = output.replaceAll(placeholder[0], placeholder[1]);
diff --git a/org.hl7.fhir.validation/src/test/java/org/hl7/fhir/validation/cli/utils/DisplayTests.java b/org.hl7.fhir.validation/src/test/java/org/hl7/fhir/validation/cli/utils/DisplayTests.java
new file mode 100644
index 000000000..d70b7aae0
--- /dev/null
+++ b/org.hl7.fhir.validation/src/test/java/org/hl7/fhir/validation/cli/utils/DisplayTests.java
@@ -0,0 +1,54 @@
+package org.hl7.fhir.validation.cli.utils;
+
+import org.junit.jupiter.api.Test;
+
+import java.io.ByteArrayOutputStream;
+import java.io.PrintStream;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+public class DisplayTests {
+
+  @Test
+  public void displayHelpDetails() {
+    final ByteArrayOutputStream outContent = new ByteArrayOutputStream();
+    final ByteArrayOutputStream errContent = new ByteArrayOutputStream();
+
+    final PrintStream originalOut = System.out;
+    final PrintStream originalErr = System.err;
+
+    System.setOut(new PrintStream(outContent));
+    System.setErr(new PrintStream(errContent));
+
+    try {
+      Display.displayHelpDetails();
+
+      String output = outContent.toString();
+
+      for (String[] placeHolder:  Display.PLACEHOLDERS) {
+        assertTrue(output.contains(placeHolder[1]), placeHolder[1] + " is not contained in output:\n" + output);
+        assertFalse(output.contains(placeHolder[0]), placeHolder[0] + " found in output:\n" + output);
+      }
+    }
+    finally {
+      System.setOut(originalOut);
+      System.setErr(originalErr);
+    }
+  }
+
+  @Test
+  public void testReplacePlaceholdersBaseCase() {
+
+    final String myTestString = "The {{DUMMY_A}} jumps over the {{DUMMY_B}}.";
+    final String[][] placeHolders = {
+      { "\\{\\{DUMMY_A\\}\\}", "quick brown fox"},
+      { "\\{\\{DUMMY_B\\}\\}", "lazy dog"},
+    };
+
+    final String expectedOutput = "The quick brown fox jumps over the lazy dog.";
+    final String output = Display.replacePlaceholders(myTestString, placeHolders);
+
+    assertEquals(expectedOutput, output);
+  }
+
+}