Add -e flag to runtests.sh to stop tests after a given file

This is useful when trying to debug an error that only happens after a
number of other tests have run -- specify -e and run tests from either
an earlier file with -s or from the beginning.

test/components/zotero-unit.js

@@ -38,6 +38,7 @@ ZoteroUnit.prototype = {
 		this.runTests = !this.makeTestData;
 		this.bail = cmdLine.handleFlag("bail", false);
 		this.startAt = cmdLine.handleFlagWithParam("startAtTestFile", false);
+		this.stopAt = cmdLine.handleFlagWithParam("stopAtTestFile", false);
 		this.grep = cmdLine.handleFlagWithParam("grep", false);
 		this.timeout = cmdLine.handleFlagWithParam("ZoteroTestTimeout", false);
 	},

test/content/runtests.js

@@ -240,6 +240,7 @@ if(run && ZoteroUnit.tests) {
 		var enumerator = testDirectory.directoryEntries;
 		let startFile = ZoteroUnit.startAt ? getTestFilename(ZoteroUnit.startAt) : false;
 		let started = !startFile;
+		let stopFile = ZoteroUnit.stopAt ? getTestFilename(ZoteroUnit.stopAt) : false;
 		while(enumerator.hasMoreElements()) {
 			var file = enumerator.getNext().QueryInterface(Components.interfaces.nsIFile);
 			if(file.leafName.endsWith(".js")) {
@@ -247,6 +248,9 @@ if(run && ZoteroUnit.tests) {
 					testFiles.push(file.leafName);
 					started = true;
 				}
+				if (file.leafName == stopFile) {
+					break;
+				}
 			}
 		}
 		if (!started) {

test/runtests.sh

@@ -35,6 +35,7 @@ Options
  -b                  skip bundled translator/style installation
  -c                  open JavaScript console and don't quit on completion
  -d LEVEL            enable debug logging
+ -e TEST             end at the given test
  -f                  stop after first test failure
  -g                  only run tests matching the given pattern (grep)
  -h                  display this help
@@ -48,7 +49,7 @@ DONE
 
 DEBUG=false
 DEBUG_LEVEL=5
-while getopts "bcd:fg:hs:tx:" opt; do
+while getopts "bcd:e:fg:hs:tx:" opt; do
 	case $opt in
         b)
         	FX_ARGS="$FX_ARGS -ZoteroSkipBundledFiles"
@@ -60,6 +61,12 @@ while getopts "bcd:fg:hs:tx:" opt; do
 			DEBUG=true
 			DEBUG_LEVEL="$OPTARG"
 			;;
+		e)
+			if [[ -z "$OPTARG" ]] || [[ ${OPTARG:0:1} = "-" ]]; then
+				usage
+			fi
+			FX_ARGS="$FX_ARGS -stopAtTestFile $OPTARG"
+			;;
 		f)
 			FX_ARGS="$FX_ARGS -bail"
 			;;