Implement explode under

3 files changed, 39 insertions, 0 deletions

diff --git a/__tests__/dice.test.js b/__tests__/dice.test.js
index 12d9130..d4e2802 100644
--- a/__tests__/dice.test.js
+++ b/__tests__/dice.test.js
@@ -8,6 +8,7 @@ const {
   bonusSubtract,
   negative,
   explode,
+  explodeUnder,
   keepHigh,
   keepLow,
   again,
@@ -483,6 +484,24 @@ describe('exploding dice', () => {
       }
     })
   })
+
+  describe('1e1d6', () => {
+    const die = explodeUnder(constant(1), d(constant(1), constant(6)))
+    testDie(die, {
+      diceCount: 1,
+      average: {
+        average: 4.2
+      },
+      variance: {
+        variance: 2.24
+      },
+      bounds: {
+        low: 2,
+        expectLow: true,
+        high: Infinity
+      }
+    })
+  })
 })
 
 describe('keep', () => {
diff --git a/__tests__/lexer.test.js b/__tests__/lexer.test.js
index 21ae3b0..0336f44 100644
--- a/__tests__/lexer.test.js
+++ b/__tests__/lexer.test.js
@@ -148,6 +148,16 @@ describe('lex', () => {
         { type: 'constant', value: 6 }
       ])
     })
+
+    test('1e1d6', () => {
+      expect(lex('1e1d6')).toEqual([
+        { type: 'constant', value: 1 },
+        { type: 'e' },
+        { type: 'constant', value: 1 },
+        { type: 'd' },
+        { type: 'constant', value: 6 }
+      ])
+    })
   })
 
   describe('keep', () => {
diff --git a/__tests__/parser.test.js b/__tests__/parser.test.js
index 70ad98d..765388d 100644
--- a/__tests__/parser.test.js
+++ b/__tests__/parser.test.js
@@ -173,6 +173,16 @@ describe('parse', () => {
         right: { type: 'constant', value: 6 }
       }
     })
+
+    expect(parse('1e1d6')).toEqual({
+      type: 'e',
+      left: { type: 'constant', value: 1 },
+      right: {
+        type: 'd',
+        left: { type: 'constant', value: 1 },
+        right: { type: 'constant', value: 6 }
+      }
+    })
   })
 
   it('parses dice with keep high', () => {