Results printed as a ascii table (and added json switch)

test/src/main/java/com/github/variety/Variety.java

@@ -23,11 +23,14 @@ public class Variety {
      * Hardcoded database name in variety.js for analysis results
      */
     public static final String VARIETY_RESULTS_DBNAME = "varietyResults";
+    public static final String FORMAT_JSON = "json";
+    public static final String FORMAT_ASCII = "ascii";
 
     public static final String PARAM_QUERY = "query";
     public static final String PARAM_SORT = "sort";
     public static final String PARAM_MAXDEPTH = "maxDepth";
     public static final String PARAM_LIMIT = "limit";
+    public static final String PARAM_OUTPUT_FORMAT = "outputFormat";
 
 
     private final String inputDatabase;
@@ -38,6 +41,7 @@ public class Variety {
     private Integer maxDepth;
     private String query;
     private String sort;
+    private String outputFormat;
 
     private boolean verbose = true;
 
@@ -99,6 +103,11 @@ public class Variety {
         return this;
     }
 
+    public Variety withFormat(final String format) {
+        this.outputFormat = format;
+        return this;
+    }
+
     /**
      * Enable analysis output stdout of script to stdout of java process.
      * Deprecated because it should only be used for debugging of test, not real/production tests itself. If you
@@ -154,6 +163,10 @@ public class Variety {
             args.add(PARAM_SORT + " = " + sort);
         }
 
+        if(outputFormat != null) {
+            args.add(PARAM_OUTPUT_FORMAT + " = '" + outputFormat + "'");
+        }
+
         return args.toString();
     }
 

test/src/test/java/com/github/variety/test/JsonOutputTest.java → test/src/test/java/com/github/variety/test/OutputFormatTest.java

@@ -9,12 +9,10 @@ import org.junit.Assert;
 import org.junit.Before;
 import org.junit.Test;
 
+import java.util.stream.Collectors;
 import java.util.stream.Stream;
 
-/**
- * Variety outputs json-like results to stdout. Lets verify that.
- */
-public class JsonOutputTest {
+public class OutputFormatTest {
 
     private Variety variety;
 
@@ -32,7 +30,7 @@ public class JsonOutputTest {
 
     @Test
     public void verifyJsonEntries() throws Exception {
-        final VarietyAnalysis analysis = variety.runAnalysis();
+        final VarietyAnalysis analysis = variety.withFormat(Variety.FORMAT_JSON).runAnalysis();
 
         // TODO: output itself is not valid JSON. It contains mongo shell output (can be removed with --quiet) and variety execution info.
         // At the end of output, there are printed records from result collection, every record on new line.
@@ -47,4 +45,28 @@ public class JsonOutputTest {
         // there should be seven different json results in the stdout
         Assert.assertEquals(7, objects.count());
     }
+
+    @Test
+    public void verifyAsciiTableOutput() throws Exception {
+        final VarietyAnalysis analysis = variety.withFormat(Variety.FORMAT_ASCII).runAnalysis();
+
+        // filter only lines starting with character '|'
+        final String actual = Stream.of(analysis.getStdOut().split("\n"))
+                .filter(line -> line.startsWith("|"))
+                .collect(Collectors.joining("\n"));
+
+        final String expected =
+                "| key                | types        | occurrences | percents |\n" +
+                "| ------------------ | ------------ | ----------- | -------- |\n" +
+                "| _id                | ObjectId     | 5           | 100      |\n" +
+                "| name               | String       | 5           | 100      |\n" +
+                "| bio                | String       | 3           | 60       |\n" +
+                "| pets               | String,Array | 2           | 40       |\n" +
+                "| birthday           | String       | 2           | 40       |\n" +
+                "| someBinData        | BinData-old  | 1           | 20       |\n" +
+                "| someWeirdLegacyKey | String       | 1           | 20       |";
+
+        Assert.assertEquals(expected, actual);
+
+    }
 }

test/src/test/java/com/github/variety/test/ParametersParsingTest.java

@@ -79,6 +79,27 @@ public class ParametersParsingTest {
         }
     }
 
+    @Test
+    public void testDefaultOutputFormatParam() throws Exception {
+        final VarietyAnalysis analysis = variety.runAnalysis(); // format option not provided
+        final Map<String, String> params = getParamsMap(analysis.getStdOut());
+        Assert.assertEquals("ascii", params.get(Variety.PARAM_OUTPUT_FORMAT));
+    }
+
+    @Test
+    public void testAsciiOutputFormatParam() throws Exception {
+        final VarietyAnalysis analysis = variety.withFormat(Variety.FORMAT_ASCII).runAnalysis();
+        final Map<String, String> params = getParamsMap(analysis.getStdOut());
+        Assert.assertEquals("ascii", params.get(Variety.PARAM_OUTPUT_FORMAT));
+    }
+
+    @Test
+    public void testJsonOutputFormatParam() throws Exception {
+        final VarietyAnalysis analysis = variety.withFormat(Variety.FORMAT_JSON).runAnalysis();
+        final Map<String, String> params = getParamsMap(analysis.getStdOut());
+        Assert.assertEquals("json", params.get(Variety.PARAM_OUTPUT_FORMAT));
+    }
+
     /**
      * @param stdout Text from mongo shell, containing variety config output + json results
      * @return Map of config values

variety.js

@@ -62,6 +62,8 @@ print('Using maxDepth of ' + maxDepth);
 if (typeof sort === 'undefined') { var sort = {_id: -1}; }
 print('Using sort of ' + tojson(sort));
 
+if (typeof outputFormat === 'undefined') { var outputFormat = "ascii" }
+print('Using outputFormat of ' + outputFormat);
 
 
 varietyTypeOf = function(thing) {
@@ -216,6 +218,24 @@ resultsDB[resultsCollectionName].find({}).forEach(function(key) {
 });
 
 var sortedKeys = resultsDB[resultsCollectionName].find({}).sort({totalOccurrences: -1});
-sortedKeys.forEach(function(key) {
+
+if(outputFormat === 'json') {
+  sortedKeys.forEach(function(key) {
     print(tojson(key, '', true));
-});
+  });
+} else {  // output nice ascii table with results
+  var table = [["key", "types", "occurrences", "percents"], ["", "", "", ""]]; // header + delimiter rows
+  sortedKeys.forEach(function(key) {
+    table.push([key._id.key, key.value.types.toString(), key.totalOccurrences, key.percentContaining])
+  });
+
+  function colMaxWidth(arr, index) {
+   return Math.max.apply(null, arr.map(function(row){return row[index].toString().length}));
+  }
+
+  function pad(width, string, symbol) { return (width <= string.length) ? string : pad(width, string + symbol, symbol); }
+
+  table.forEach(function(row, ri){
+    print("| " + row.map(function(cell, i) {return pad(colMaxWidth(table, i), cell, ri == 1 ? "-" : " ")}).join(" | ") + " |");
+  });
+}