Gracefully handle empty rule description

Fixes pmd#127

lib/annotations.js

@@ -52,7 +52,10 @@ function createAnnotation(location, title) {
 }
 
 function createDescription(rule) {
-    const lines = rule.fullDescription.text.split(/\n|\r\n/);
+    const lines = rule.fullDescription.text !== undefined
+        ? rule.fullDescription.text.split(/\n|\r\n/)
+        : [''];
+
     // remove empty first line
     if (lines.length > 1 && lines[0] === '') {
         lines.splice(0, 1);

tests/annotations.test.js

@@ -59,4 +59,37 @@ https://pmd.github.io/pmd-6.40.0/pmd_rules_apex_bestpractices.html#unusedlocalva
         expect(core.notice).toHaveBeenNthCalledWith(1, 'Full description for Low Prio Rule\n\n4 - low prio rule (Priority: 5, Ruleset: sample ruleset)\nhttps://pmd.github.io/latest/ruleLowPrio', { title: 'Low Prio Rule', file: '/folder/file5.txt', startLine: 8 });
         expect(core.notice).toHaveBeenNthCalledWith(2, 'Full description for Low Prio Rule\n\n4 - low prio rule (Priority: 5, Ruleset: sample ruleset)\nhttps://pmd.github.io/latest/ruleLowPrio', { title: 'Low Prio Rule', file: '/folder/file6.txt', startLine: 9 });
     });
+
+    it('can deal with empty full description (issue #127)', () => {
+        const report = sarif.loadReport(path.join(__dirname, 'data', 'pmd-report-empty-full-description.sarif'));
+        annotations.processSarifReport(report);
+
+        expect(core.error).toHaveBeenCalledTimes(0);
+        expect(core.warning).toHaveBeenCalledTimes(1);
+        expect(core.warning).toHaveBeenNthCalledWith(1, `The first parameter of System.debug, when using the signature with two parameters, is a LoggingLevel enum.
+
+Having the Logging Level specified provides a cleaner log, and improves readability of it.
+
+DebugsShouldUseLoggingLevel (Priority: 3, Ruleset: Best Practices)
+https://pmd.github.io/pmd-6.49.0/pmd_rules_apex_bestpractices.html#debugsshoulduselogginglevel`,
+            {
+                title: 'Calls to System.debug should specify a logging level.',
+                file: '/home/andreas/PMD/source/pmd-it/pmd-github-action-issue-127/src/Test.cls',
+                startLine: 3,
+                endLine: 3
+            }
+        );
+        expect(core.notice).toHaveBeenCalledTimes(1);
+        expect(core.notice).toHaveBeenNthCalledWith(1, `
+
+AvoidProductionDebugLogs (Priority: 5, Ruleset: My Default)
+`,
+            {
+                title: 'Avoid leaving System.debug() statments in code as they negativly influence performance.',
+                file: '/home/andreas/PMD/source/pmd-it/pmd-github-action-issue-127/src/Test.cls',
+                startLine: 3,
+                endLine: 3
+            }
+        );
+    });
 });

tests/data/pmd-report-empty-full-description.sarif

@@ -0,0 +1,106 @@
+{
+    "$schema": "https://raw.githubusercontent.com/oasis-tcs/sarif-spec/master/Schemata/sarif-schema-2.1.0.json",
+    "version": "2.1.0",
+    "runs": [
+      {
+        "tool": {
+          "driver": {
+            "name": "PMD",
+            "version": "6.49.0",
+            "informationUri": "https://pmd.github.io/pmd/",
+            "rules": [
+              {
+                "id": "AvoidProductionDebugLogs",
+                "shortDescription": {
+                  "text": "Avoid leaving System.debug() statments in code as they negativly influence performance."
+                },
+                "fullDescription": {},
+                "helpUri": "",
+                "help": {},
+                "properties": {
+                  "ruleset": "My Default",
+                  "priority": 5,
+                  "tags": [
+                    "My Default"
+                  ]
+                }
+              },
+              {
+                "id": "DebugsShouldUseLoggingLevel",
+                "shortDescription": {
+                  "text": "Calls to System.debug should specify a logging level."
+                },
+                "fullDescription": {
+                  "text": "\nThe first parameter of System.debug, when using the signature with two parameters, is a LoggingLevel enum.\n\nHaving the Logging Level specified provides a cleaner log, and improves readability of it.\n       "
+                },
+                "helpUri": "https://pmd.github.io/pmd-6.49.0/pmd_rules_apex_bestpractices.html#debugsshoulduselogginglevel",
+                "help": {
+                  "text": "\nThe first parameter of System.debug, when using the signature with two parameters, is a LoggingLevel enum.\n\nHaving the Logging Level specified provides a cleaner log, and improves readability of it.\n       "
+                },
+                "properties": {
+                  "ruleset": "Best Practices",
+                  "priority": 3,
+                  "tags": [
+                    "Best Practices"
+                  ]
+                }
+              }
+            ]
+          }
+        },
+        "results": [
+          {
+            "ruleId": "AvoidProductionDebugLogs",
+            "ruleIndex": 0,
+            "message": {
+              "text": "Avoid leaving System.debug() statments in code as they negativly influence performance."
+            },
+            "locations": [
+              {
+                "physicalLocation": {
+                  "artifactLocation": {
+                    "uri": "/home/andreas/PMD/source/pmd-it/pmd-github-action-issue-127/src/Test.cls"
+                  },
+                  "region": {
+                    "startLine": 3,
+                    "startColumn": 12,
+                    "endLine": 3,
+                    "endColumn": 16
+                  }
+                }
+              }
+            ]
+          },
+          {
+            "ruleId": "DebugsShouldUseLoggingLevel",
+            "ruleIndex": 1,
+            "message": {
+              "text": "Calls to System.debug should specify a logging level."
+            },
+            "locations": [
+              {
+                "physicalLocation": {
+                  "artifactLocation": {
+                    "uri": "/home/andreas/PMD/source/pmd-it/pmd-github-action-issue-127/src/Test.cls"
+                  },
+                  "region": {
+                    "startLine": 3,
+                    "startColumn": 12,
+                    "endLine": 3,
+                    "endColumn": 16
+                  }
+                }
+              }
+            ]
+          }
+        ],
+        "invocations": [
+          {
+            "executionSuccessful": true,
+            "toolConfigurationNotifications": [],
+            "toolExecutionNotifications": []
+          }
+        ]
+      }
+    ]
+}