diff --git a/awk/README.md b/awk/README.md
index 9c2c28b1..e79fdc32 100644
--- a/awk/README.md
+++ b/awk/README.md
@@ -22,3 +22,4 @@
 - [luhn](./luhn/README.md)
 - [series](./series/README.md)
 - [atbash-cipher](./atbash-cipher/README.md)
+- [raindrops](./raindrops/README.md)
diff --git a/awk/raindrops/README.md b/awk/raindrops/README.md
index e0bf6511..4d5bdf12 100644
--- a/awk/raindrops/README.md
+++ b/awk/raindrops/README.md
@@ -37,4 +37,11 @@ You'll need to implement the logic inside the `BEGIN` block.
 
 ### Based on
 
-A variation on FizzBuzz, a famous technical interview question that is intended to weed out potential candidates. That question is itself derived from Fizz Buzz, a popular children's game for teaching division. - https://en.wikipedia.org/wiki/Fizz_buzz
\ No newline at end of file
+A variation on FizzBuzz, a famous technical interview question that is intended to weed out potential candidates. That question is itself derived from Fizz Buzz, a popular children's game for teaching division. - https://en.wikipedia.org/wiki/Fizz_buzz
+
+### My Solution
+
+- [my solution](./raindrops.awk)
+- [awkunit tests](./raindrops_test.awk)
+- [test cases](./test-cases.awk)
+- [run-tests](./run-tests-awk.txt)
diff --git a/awk/raindrops/awkunit.awk b/awk/raindrops/awkunit.awk
new file mode 120000
index 00000000..38a08adf
--- /dev/null
+++ b/awk/raindrops/awkunit.awk
@@ -0,0 +1 @@
+../.lib/awkunit.awk
\ No newline at end of file
diff --git a/awk/raindrops/raindrops.awk b/awk/raindrops/raindrops.awk
index 44c3df84..2f091738 100644
--- a/awk/raindrops/raindrops.awk
+++ b/awk/raindrops/raindrops.awk
@@ -1,7 +1,55 @@
+#!/usr/bin/gawk --lint --file
+
+@load "ordchr"
+
 # These variables are initialized on the command line (using '-v'):
-# - num
+# - num -> ^([0-9]+$
+
+function raindrops(number) {
+    sounds = ""
+
+    if (length(number) == 0) {
+        return "error: nothing has no sound"
+    }
+
+    if (number == 0) {
+        return number
+    }
+
+    if (number % 3 == 0) {
+        sounds = sounds "Pling"
+    }
+
+    if (number % 5 == 0) {
+        sounds = sounds "Plang"
+    }
+
+    if (number % 7 == 0) {
+        sounds = sounds "Plong"
+    }
+
+    if (length(sounds) == 0) {
+        sounds = number
+    }
+
+    return sounds
+}
 
 BEGIN {
-    print "Implement this solution" > "/dev/stderr"
-    exit 1
+    # let's make sure direction isn't being used to inject code
+    if (! match(num, /^[0-9]+$/)) {
+        print "error: invalid number [" num "], the only supported numbers are ^[0-9]+$"
+        exit 1
+    }
+
+    print raindrops(num)
+
+    exit 0
+}
+
+{
+    # using this section got us stuck waiting for input that is only given via variables
+}
+
+END {
 }
diff --git a/awk/raindrops/raindrops_test.awk b/awk/raindrops/raindrops_test.awk
new file mode 100644
index 00000000..f8c00c9c
--- /dev/null
+++ b/awk/raindrops/raindrops_test.awk
@@ -0,0 +1,75 @@
+#!/usr/bin/gawk --lint --file
+
+@include "awkunit"
+@include "test-cases"
+@include "raindrops"
+
+passed = 0
+testCount = 0
+
+function _debugTestPre() {
+    printf "Test %s:\n", (passed + 1)
+    printf "     input -> [%s]\n", input
+}
+
+function _debugTestPost() {
+    passed = passed + 1
+    printf "    output -> [%s]\n", got
+    printf "    result -> passed\n\n"
+}
+
+function testRaindrops_empty() {
+    input = ""
+    want = "error: nothing has no sound"
+
+    # _ = split(input, a, " ")
+
+    _debugTestPre()
+    got = raindrops(input)
+
+    assertEquals(got, want)
+    _debugTestPost()
+}
+
+function casesRaindrops() {
+    printf "Running %d test cases\n\n", length(cases)
+    caseNum = 0
+
+    # Associative arrays don't preserve insert order.
+    for (key in cases) {
+        input = key
+        want = cases[key]
+
+        # _ = split(input, a, " ")
+
+        _debugTestPre()
+        got = raindrops(input)
+
+        assertEquals(got, want)
+        _debugTestPost()
+    }
+}
+
+BEGIN {
+    exit 0
+}
+
+END {
+    cmd = "grep --no-filename --count ^function\\ test *_test.awk"
+    cmd | getline testCount
+
+    printf "\nRunning %d tests...\n\n", testCount
+
+    testCount = testCount + length(cases)
+
+    # running tests with a lot of duplication
+    testRaindrops_empty()
+
+    # running tests with reduced duplication
+    casesRaindrops()
+
+    print "\n" passed " out of " testCount " tests passed!"
+
+    # add exit here to keep it from looping
+    exit 0
+}
diff --git a/awk/raindrops/run-tests-awk.txt b/awk/raindrops/run-tests-awk.txt
new file mode 100644
index 00000000..9b8f3556
--- /dev/null
+++ b/awk/raindrops/run-tests-awk.txt
@@ -0,0 +1,275 @@
+Running automated test file(s):
+
+
+===============================================================================
+
+AWKLIBPATH=/usr/lib/x86_64-linux-gnu/gawk:../.lib
+
+/usr/lib/x86_64-linux-gnu/gawk
+filefuncs.so
+fnmatch.so
+fork.so
+inplace.so
+intdiv.so
+ordchr.so
+readdir.so
+readfile.so
+revoutput.so
+revtwoway.so
+rwarray.so
+time.so
+
+../.lib
+awkunit.awk
+awkunit.so
+
+gawk --lint --file=./awkunit.awk < /dev/null > /dev/null
+gawk: ./awkunit.awk:3: warning: `load' is a gawk extension
+gawk: warning: function `assertEquals' defined but never called directly
+gawk: warning: function `assert' defined but never called directly
+gawk: ./awkunit.awk:26: warning: reference to uninitialized variable `_assert_exit'
+
+real	0m0.004s
+user	0m0.002s
+sys	0m0.002s
+
+gawk --lint --file=./raindrops.awk < /dev/null > /dev/null
+gawk: ./raindrops.awk:3: warning: `load' is a gawk extension
+gawk: ./raindrops.awk:40: warning: reference to uninitialized variable `num'
+gawk: ./raindrops.awk:41: warning: reference to uninitialized variable `num'
+
+real	0m0.002s
+user	0m0.001s
+sys	0m0.001s
+
+gawk --lint --file=./test-cases.awk < /dev/null > /dev/null
+
+real	0m0.002s
+user	0m0.001s
+sys	0m0.001s
+
+exit 1
+
+===============================================================================
+
+Running: bats ./test-raindrops.bats
+1..18
+ok 1 the sound for 1 is 1
+ok 2 the sound for 3 is Pling
+ok 3 the sound for 5 is Plang
+ok 4 the sound for 7 is Plong
+ok 5 the sound for 6 is Pling as it has a factor 3
+ok 6 2 to the power 3 does not make a raindrop sound as 3 is the exponent not the base
+ok 7 the sound for 9 is Pling as it has a factor 3
+ok 8 the sound for 10 is Plang as it has a factor 5
+ok 9 the sound for 14 is Plong as it has a factor of 7
+ok 10 the sound for 15 is PlingPlang as it has factors 3 and 5
+ok 11 the sound for 21 is PlingPlong as it has factors 3 and 7
+ok 12 the sound for 25 is Plang as it has a factor 5
+ok 13 the sound for 27 is Pling as it has a factor 3
+ok 14 the sound for 35 is PlangPlong as it has factors 5 and 7
+ok 15 the sound for 49 is Plong as it has a factor 7
+ok 16 the sound for 52 is 52
+ok 17 the sound for 105 is PlingPlangPlong as it has factors 3, 5 and 7
+ok 18 the sound for 3125 is Plang as it has a factor 5
+
+real	0m0.645s
+user	0m0.430s
+sys	0m0.237s
+
+exit 0
+
+===============================================================================
+
+AWKLIBPATH=/usr/lib/x86_64-linux-gnu/gawk:../.lib
+
+/usr/lib/x86_64-linux-gnu/gawk
+filefuncs.so
+fnmatch.so
+fork.so
+inplace.so
+intdiv.so
+ordchr.so
+readdir.so
+readfile.so
+revoutput.so
+revtwoway.so
+rwarray.so
+time.so
+
+../.lib
+awkunit.awk
+awkunit.so
+
+Running: gawk --file ./raindrops_test.awk && printf \n%s\n Tests Passed! || printf \n%s\n Tests Failed!
+
+Running 1 tests...
+
+Test 1:
+     input -> []
+    output -> [error: nothing has no sound]
+    result -> passed
+
+Running 28 test cases
+
+Test 2:
+     input -> [-1]
+    output -> [-1]
+    result -> passed
+
+Test 3:
+     input -> [-3]
+    output -> [Pling]
+    result -> passed
+
+Test 4:
+     input -> [-7]
+    output -> [Plong]
+    result -> passed
+
+Test 5:
+     input -> [-5]
+    output -> [Plang]
+    result -> passed
+
+Test 6:
+     input -> [0]
+    output -> [0]
+    result -> passed
+
+Test 7:
+     input -> [1]
+    output -> [1]
+    result -> passed
+
+Test 8:
+     input -> [3]
+    output -> [Pling]
+    result -> passed
+
+Test 9:
+     input -> [5]
+    output -> [Plang]
+    result -> passed
+
+Test 10:
+     input -> [6]
+    output -> [Pling]
+    result -> passed
+
+Test 11:
+     input -> [7]
+    output -> [Plong]
+    result -> passed
+
+Test 12:
+     input -> [8]
+    output -> [8]
+    result -> passed
+
+Test 13:
+     input -> [9]
+    output -> [Pling]
+    result -> passed
+
+Test 14:
+     input -> [10]
+    output -> [Plang]
+    result -> passed
+
+Test 15:
+     input -> [11]
+    output -> [11]
+    result -> passed
+
+Test 16:
+     input -> [12]
+    output -> [Pling]
+    result -> passed
+
+Test 17:
+     input -> [14]
+    output -> [Plong]
+    result -> passed
+
+Test 18:
+     input -> [15]
+    output -> [PlingPlang]
+    result -> passed
+
+Test 19:
+     input -> [21]
+    output -> [PlingPlong]
+    result -> passed
+
+Test 20:
+     input -> [25]
+    output -> [Plang]
+    result -> passed
+
+Test 21:
+     input -> [28]
+    output -> [Plong]
+    result -> passed
+
+Test 22:
+     input -> [35]
+    output -> [PlangPlong]
+    result -> passed
+
+Test 23:
+     input -> [49]
+    output -> [Plong]
+    result -> passed
+
+Test 24:
+     input -> [52]
+    output -> [52]
+    result -> passed
+
+Test 25:
+     input -> [70]
+    output -> [PlangPlong]
+    result -> passed
+
+Test 26:
+     input -> [105]
+    output -> [PlingPlangPlong]
+    result -> passed
+
+Test 27:
+     input -> [210]
+    output -> [PlingPlangPlong]
+    result -> passed
+
+Test 28:
+     input -> [945]
+    output -> [PlingPlangPlong]
+    result -> passed
+
+Test 29:
+     input -> [3125]
+    output -> [Plang]
+    result -> passed
+
+
+29 out of 29 tests passed!
+
+real	0m0.009s
+user	0m0.002s
+sys	0m0.007s
+
+Tests Passed!
+
+exit 0
+
+===============================================================================
+
+Running: misspell .
+
+real	0m0.026s
+user	0m0.028s
+sys	0m0.012s
+
+===============================================================================
+
diff --git a/awk/raindrops/test-cases.awk b/awk/raindrops/test-cases.awk
new file mode 100644
index 00000000..8a12bdb6
--- /dev/null
+++ b/awk/raindrops/test-cases.awk
@@ -0,0 +1,46 @@
+#!/usr/bin/gawk --lint --file
+# test-cases.awk
+
+#   key: input
+# value: output
+
+BEGIN {
+    cases["0"]="0"
+
+    cases["-1"]="-1"
+    cases["-3"]="Pling"
+    cases["-5"]="Plang"
+    cases["-7"]="Plong"
+
+    cases["1"]="1"
+    cases["8"]="8"
+    cases["11"]="11"
+    cases["52"]="52"
+
+    cases["3"]="Pling"
+    cases["6"]="Pling"
+    cases["9"]="Pling"
+    cases["12"]="Pling"
+
+    cases["5"]="Plang"
+    cases["10"]="Plang"
+    cases["25"]="Plang"
+    cases["3125"]="Plang"
+
+    cases["7"]="Plong"
+    cases["14"]="Plong"
+    cases["28"]="Plong"
+    cases["49"]="Plong"
+
+    cases["15"]="PlingPlang"
+    cases["21"]="PlingPlong"
+    cases["35"]="PlangPlong"
+    cases["70"]="PlangPlong"
+
+    cases["105"]="PlingPlangPlong"
+    cases["210"]="PlingPlangPlong"
+    cases["945"]="PlingPlangPlong"
+
+    # add exit here to keep it from waiting for input
+    exit 0
+}