chore(install+test): single cmd to full install/test & test JS w/o Dart

* `npm install` now does a full install; auxiliary installation steps
have been integrated into the `postinstall` script.
* Updated developer docs `DEVELOPER.md` accordingly; also added
instructions to dev docs for performing full tests (via `npm test`) --
same as those run on Travis.
* Reorg in tests so that JS tests can run without a Dart env.

Partly fixes #945 **under the assumption that when running JS tests
locally, `ChromeCanary` is the desired browser to use**. Note that CI
tests (Travis) still uses `DartiumWithWebPlatform` across the board
(Maybe because ChromeCanary isn't being installed?)

Fixes #1012.

Closes #1010

scripts/ci/env_dart.sh

@@ -1,4 +1,4 @@
-#!/bin/false
+#!/bin/bash
 set -e -o pipefail
 
 if [[ -z $ENV_SET ]]; then
@@ -95,4 +95,4 @@ if [[ -z $ENV_SET ]]; then
   echo NGDART_SCRIPT_DIR=$NGDART_SCRIPT_DIR
   $DART --version 2>&1
 
-fi
+fi

scripts/ci/test_dart.sh

@@ -4,8 +4,9 @@ set -e
 echo =============================================================================
 # go to project dir
 SCRIPT_DIR=$(dirname $0)
+source $SCRIPT_DIR/env_dart.sh
 cd $SCRIPT_DIR/../..
 
-${SCRIPT_DIR}/test_unit_dart.sh
+./node_modules/.bin/gulp test.js --browsers=$KARMA_BROWSERS
 ${SCRIPT_DIR}/test_server_dart.sh
 ${SCRIPT_DIR}/test_e2e_dart.sh

scripts/ci/test_e2e_dart.sh

@@ -4,7 +4,6 @@ set -e
 echo =============================================================================
 # go to project dir
 SCRIPT_DIR=$(dirname $0)
-source $SCRIPT_DIR/env_dart.sh
 cd $SCRIPT_DIR/../..
 
 ./node_modules/.bin/webdriver-manager update

scripts/ci/test_e2e_js.sh

@@ -4,7 +4,6 @@ set -e
 echo =============================================================================
 # go to project dir
 SCRIPT_DIR=$(dirname $0)
-source $SCRIPT_DIR/env_dart.sh
 cd $SCRIPT_DIR/../..
 
 ./node_modules/.bin/webdriver-manager update
@@ -21,4 +20,10 @@ trap killServer EXIT
 # wait for server to come up!
 sleep 10
 
-./node_modules/.bin/protractor protractor-js.conf.js --browsers=${E2E_BROWSERS:-Dartium}
+# Let protractor use default browser unless one is specified.
+OPTIONS="";
+if [[ -n "$E2E_BROWSERS" ]]; then
+  OPTIONS="--browsers=$E2E_BROWSERS";
+fi
+
+./node_modules/.bin/protractor protractor-js.conf.js $OPTIONS

scripts/ci/test_js.sh

@@ -6,6 +6,11 @@ echo ===========================================================================
 SCRIPT_DIR=$(dirname $0)
 cd $SCRIPT_DIR/../..
 
-${SCRIPT_DIR}/test_unit_js.sh
-# ${SCRIPT_DIR}/test_server_js.sh # JS doesn't yet have server tests
+# Issue #945 Travis still uses Dartium, and hence needs the env setup.
+# For local tests, when a developer doesn't have Dart, don't source env_dart.sh
+if  ${SCRIPT_DIR}/env_dart.sh 2>&1 > /dev/null ; then
+    source $SCRIPT_DIR/env_dart.sh
+fi
+
+./node_modules/.bin/gulp test.js --browsers=${KARMA_BROWSERS:-ChromeCanary}
 ${SCRIPT_DIR}/test_e2e_js.sh

scripts/ci/test_server_dart.sh

@@ -4,7 +4,6 @@ set -e
 echo =============================================================================
 # go to project dir
 SCRIPT_DIR=$(dirname $0)
-source $SCRIPT_DIR/env_dart.sh
 cd $SCRIPT_DIR/../..
 
 ./node_modules/.bin/webdriver-manager update

scripts/ci/test_unit_dart.sh

@@ -1,11 +0,0 @@
-#!/bin/bash
-set -e
-
-echo =============================================================================
-# go to project dir
-SCRIPT_DIR=$(dirname $0)
-source $SCRIPT_DIR/env_dart.sh
-cd $SCRIPT_DIR/../..
-
-./node_modules/.bin/gulp test.transpiler.unittest
-./node_modules/.bin/gulp test.unit.dart/ci --browsers=$KARMA_BROWSERS

scripts/ci/test_unit_js.sh

@@ -1,13 +0,0 @@
-#!/bin/bash
-set -e
-
-echo =============================================================================
-# go to project dir
-SCRIPT_DIR=$(dirname $0)
-source $SCRIPT_DIR/env_dart.sh
-cd $SCRIPT_DIR/../..
-
-./node_modules/.bin/gulp test.transpiler.unittest
-./node_modules/.bin/gulp docs/test
-./node_modules/.bin/gulp test.unit.js/ci --browsers=$KARMA_BROWSERS
-./node_modules/.bin/gulp test.unit.cjs/ci