Add analytical solution for DFOP-SFO

This is about twice as fast as deSolve compiled with FOCUS D

1 files changed, 13 insertions, 1 deletions

diff --git a/tests/testthat/test_analytical.R b/tests/testthat/test_analytical.R
index 5972a18a..578258d3 100644
--- a/tests/testthat/test_analytical.R
+++ b/tests/testthat/test_analytical.R
@@ -1,6 +1,6 @@
 context("Analytical solutions for coupled models")
 
-test_that("The analytical solutions of SFO-SFO are correct", {
+test_that("The analytical solutions for SFO-SFO are correct", {
   # No sink, no formation fractions
   SFO_SFO_nosink <- mkinmod(
     parent = mkinsub("SFO", to = "m1", sink = FALSE),
@@ -44,3 +44,15 @@ test_that("The analytical solutions of SFO-SFO are correct", {
   )
 
 })
+
+test_that("The analytical solution for DFOP-SFO are correct", {
+  # With formation fraction
+  f_dfop_sfo_analytical <- mkinfit(DFOP_SFO, FOCUS_D,
+    solution_type = "analytical", quiet = TRUE)
+  f_dfop_sfo_desolve <- mkinfit(DFOP_SFO, FOCUS_D,
+    solution_type = "deSolve", quiet = TRUE)
+  expect_equal(
+    parms(f_dfop_sfo_analytical),
+    parms(f_dfop_sfo_desolve)
+  )
+})