generate-json-schema 2.1.1 (new formula)

Closes Homebrew/homebrew#43368.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>

Formula/generate-json-schema.rb

@@ -0,0 +1,115 @@
+class GenerateJsonSchema < Formula
+  desc "Generate a JSON Schema from Sample JSON"
+  homepage "https://github.com/Nijikokun/generate-schema"
+  url "https://github.com/Nijikokun/generate-schema/archive/v2.1.1.tar.gz"
+  sha256 "bf43a7e616419876293e7de738dece27b3deb719cf5e8cc99bb309a5fb179af0"
+
+  head "https://github.com/Nijikokun/generate-schema.git"
+
+  depends_on "node"
+
+  def install
+    ENV.prepend_path "PATH", "#{Formula["node"].opt_libexec}/npm/bin"
+
+    system "npm", "install"
+    libexec.install Dir["*"]
+    bin.install_symlink Dir["#{libexec}/bin/*"]
+  end
+
+  test do
+    require "open3"
+
+    input = <<-EOS.undent
+      {
+          "id": 2,
+          "name": "An ice sculpture",
+          "price": 12.50,
+          "tags": ["cold", "ice"],
+          "dimensions": {
+              "length": 7.0,
+              "width": 12.0,
+              "height": 9.5
+          },
+          "warehouseLocation": {
+              "latitude": -78.75,
+              "longitude": 20.4
+          }
+      }
+    EOS
+
+    output = <<-EOS.undent.chomp
+      Welcome to Generate Schema 2.1.1
+
+        Mode: json
+
+      * Example Usage:
+        > {a:'b'}
+        { a: { type: 'string' } }
+
+      To quit type: exit
+
+      > {
+        "$schema": "http://json-schema.org/draft-04/schema#",
+        "type": "object",
+        "properties": {
+          "id": {
+            "type": "number"
+          },
+          "name": {
+            "type": "string"
+          },
+          "price": {
+            "type": "number"
+          },
+          "tags": {
+            "type": "array",
+            "items": {
+              "type": "string"
+            }
+          },
+          "dimensions": {
+            "type": "object",
+            "properties": {
+              "length": {
+                "type": "number"
+              },
+              "width": {
+                "type": "number"
+              },
+              "height": {
+                "type": "number"
+              }
+            }
+          },
+          "warehouseLocation": {
+            "type": "object",
+            "properties": {
+              "latitude": {
+                "type": "number"
+              },
+              "longitude": {
+                "type": "number"
+              }
+            }
+          }
+        }
+      }
+      >
+    EOS
+
+    # As of v2.1.1, there is a bug when passing in a filename as an argument
+    # The following commented out test will fail until this bug is fixed.
+    # ("#{testpath}/test.json").write(input)
+    # system "#{bin}/generate-schema", "#{testpath}/test.json"
+
+    # Until it is fixed, STDIN can be used as a workaround
+    Open3.popen3("#{bin}/generate-schema") do |stdin, stdout, _|
+      stdin.write(input)
+      stdin.close
+      # Program leaks spaces at the end of lines. This line cleans them up
+      # so they don't cause the assert below to erroneously fail.
+      result = stdout.map(&:rstrip).join("\n")
+      assert_equal output, result
+    end
+  end
+end