[incubator-openwhisk-devtools] branch master updated: A local test script for node.js functions (#26)

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The following commit(s) were added to refs/heads/master by this push:
       new  54b388e   A local test script for node.js functions (#26)
54b388e is described below

commit 54b388e72d83ba677418c1eaf2cf03aaaf31320e
Author: Lars Trieloff <la...@trieloff.net>
AuthorDate: Wed May 10 04:26:46 2017 +0100

    A local test script for node.js functions (#26)
    
    * A local test script for node.js functions
    
    As [suggested by Carlos](https://twitter.com/csantanapr/status/861362098877739009) and [initially provided by Raymond](https://www.raymondcamden.com/2017/01/09/quick-tip-for-testing-openwhisk-actions-locally).
    
    * We don’t need zlib
---
 node-local/README.md | 24 +++++++++++++++++++++
 node-local/test.js   | 59 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 83 insertions(+)

diff --git a/node-local/README.md b/node-local/README.md
new file mode 100644
index 0000000..2de3234
--- /dev/null
+++ b/node-local/README.md
@@ -0,0 +1,24 @@
+# Testing node.js functions locally
+
+Usage:
+
+```bash
+node test.js ./path-to-function.js parameter=value parameter2=value2
+```
+
+Will invoke the `main` function of `path-to-function.js` with following `params`:
+```javascript
+{
+  "parameter":"value",
+  "parameter2":"value"
+}
+```
+
+Alternatively, input can be passed on stdin, this allows the creation of more complex input
+objects that would be inconvenient to edit on the command line or passing non-string values.
+
+```bash
+echo '{"boolean": true}' | node test.js ./path-to-function.js
+cat input.json | node test.js ./path-to-function.js
+```
+
diff --git a/node-local/test.js b/node-local/test.js
new file mode 100644
index 0000000..16041f1
--- /dev/null
+++ b/node-local/test.js
@@ -0,0 +1,59 @@
+process.stdin.setEncoding('utf8');
+
+if (process.argv[2]=="--help"||process.argv[2]=="-h") {
+  help();
+} else if (!process.stdin.isTTY) {
+  var input = "";
+  
+  process.stdin.on('readable', () => {
+    var chunk = process.stdin.read();
+    if (chunk !== null) {
+      input += chunk;
+    }
+  });
+  
+  process.stdin.on('end', () => {
+    const params = JSON.parse(input);
+    
+    run(params);
+  });
+  
+} else {
+  let params = {};
+  for(var i=3;i<process.argv.length;i++) {
+      let [name,value] = process.argv[i].split('=');
+      params[name] = value;
+  }
+  run(params);
+}
+
+function help() {
+  console.log("");
+  console.log("Usage:");
+  console.log("  node test.js ./main.js foo=bar");
+  console.log("  echo '{\"foo\":\"bar\"}' | node test.js ./main.js");
+}
+
+function run(params) {
+  const actionToRun = process.argv[2];
+  
+  if (!actionToRun) {
+    console.error("./test.js: Missing argument <action-to-run>");
+    help();
+    process.exit(1);
+  }
+  
+  const imports = require(actionToRun);
+  //support a non-exported main function as a fallback
+  const action = imports.main ? imports.main : main;
+  
+  let result = action(params);
+  
+  if (result.then) {
+    Promise.resolve(result)
+      .then(result => console.log(result.toString("utf-8")))
+      .catch(error => console.error(error));
+  } else {
+    console.log(result);
+  }
+}
\ No newline at end of file

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